PEG 300 POLYETHYLENE GLYCOL

PEG 300 Description — Highly Versatile Industrial Grade Polyethylene Glycol 300

At Quimiconsult we offer PEG 300, also known as Polyethylene Glycol 300, Poly(ethylene oxide) 300, PEG-300 or macrogol 300, a multifunctional product widely used in the cosmetics, chemical, textile, ceramics, metalworking, personal care, formulation and manufacturing industries thanks to its unique combination of properties: excellent solvency, lubricity, hygroscopicity, compatibility with a wide range of ingredients, chemical stability under normal conditions and a safe handling profile. It is a viscous, colorless to slightly yellowish, practically odorless liquid, fully miscible in water, with an average molecular weight in the range of 285 to 315 g/mol, a hydroxyl value of 356 to 394 mg KOH/g, a 5% aqueous solution pH in the range of 4.5 to 7.5, a density of 1.11 to 1.14 g/mL at 25 °C, a maximum free ethylene oxide content of 10 ppm, and a total free ethylene glycol and diethylene glycol content less than or equal to 0.25% — parameters that ensure consistent quality and predictable performance in industrial formulation.

PEG 300 belongs to the chemical family of polyethylene glycols (PEG), a series of linear polymers obtained by polymerizing ethylene oxide with water or ethylene glycol as the initiator, whose general structure follows the formula HO-(CH₂CH₂O)ₙ-H, where "n" is the average number of repeating ethylene oxide units that defines the molecular weight of each specific grade. For PEG 300, "n" averages between 6 and 7 ethylene oxide units, which places it among the PEGs that are liquid at room temperature (approximately 25 °C) — a characteristic that sets it apart from higher grades (PEG 600 is semi-solid, and PEG 1000 and above are waxy solids at room temperature). This liquid nature, combined with its high water solubility, its miscibility with alcohols, glycols and many polar organic solvents, and its low volatility, makes it one of the most versatile PEG grades for formulating liquid products, emulsions, dispersions, aqueous lubricants and carriers for active ingredients.

The CAS number for polyethylene glycol is 25322-68-3 (shared by the entire PEG family, which is differentiated by average molecular weight). Under INCI (International Nomenclature of Cosmetic Ingredients) nomenclature for cosmetic applications, the ingredient is identified as PEG-6 (PEG 300 roughly corresponds to 6 ethylene oxide units), although in industry it is far more common to refer to the product by its average molecular weight (PEG 300, PEG 400, PEG 600, etc.) than by the numeric INCI name. PEG 300 is widely recognized in international technical literature, industrial regulations and raw material specifications across many manufacturing sectors.

Industrial grade PEG 300 is characterized by its behavior as a universal cosolvent and carrier, capable of dissolving polar and moderately nonpolar substances at the same time. This allows it to act as a solubilizing bridge between incompatible ingredients, as a carrier for hydrophobic actives in aqueous systems, and as a modifier of viscosity and rheological properties in complex formulations. In addition, its hygroscopicity (its ability to absorb ambient moisture) makes it very useful as a humectant in formulations that require water retention, as a plasticizer in polymer systems, and as a modifier of sensory properties in cosmetic and personal care applications.

At Quimiconsult, located in San Nicolás de los Garza, Nuevo León, we distribute industrial grade PEG 300 with nationwide coverage, formulation technical support, lot-specific certificates of analysis, and up-to-date technical data sheets (TDS) and safety data sheets (SDS), serving industrial grade cosmetic formulators, textile plants, ceramic and technical porcelain factories, foundry and metal molding shops, industrial chemical manufacturers, surface treatment plants, aqueous lubricant formulators, ink, adhesive and coating manufacturers, development laboratories and R&D departments throughout Mexico.

Technical Specifications and Physicochemical Properties of Industrial Grade PEG 300

The PEG 300 we sell meets a consistent lot-to-lot quality profile, verifiable through a Certificate of Analysis (CoA), which ensures predictable functional performance in industrial formulation. The certified technical properties are as follows:

• Appearance: viscous, clear, colorless to slightly yellowish liquid.
• Odor: practically odorless, very mild characteristic odor.
• Average molecular weight range: 285 to 315 g/mol.
• Hydroxyl value: 356 to 394 mg KOH/g (a parameter that confirms the concentration of terminal hydroxyl groups and, by extension, the average molecular weight).
• Water solubility at 20 °C: complete, in all proportions (total miscibility).
• pH (5% aqueous solution): 4.5 to 7.5 (slightly acidic to neutral).
• Density at 25 °C: 1.11 to 1.14 g/mL.
• Free ethylene oxide: maximum 10 ppm (residual from the polymerization process; a critical purity parameter).
• Total free ethylene glycol and diethylene glycol: maximum 0.25% (a purity parameter that limits the presence of low-molecular-weight oligomers).

Beyond these basic parameters, PEG 300 offers a set of functional and handling properties that are what really determine its value in industrial formulation:

• Physical state at room temperature: viscous liquid that is easy to pump and dose, requiring no preheating in most applications (unlike PEG 600, which in many situations must be heated above its melting point).
• Broad solubility: fully miscible in water, ethanol, methanol, isopropanol, acetone, propylene glycol, glycerin, dimethyl sulfoxide (DMSO), dimethylformamide (DMF), aldehydes and many polar organic solvents. Partially soluble in ethers and aromatics. Immiscible with saturated aliphatic hydrocarbons, mineral oils and vegetable oils (although it can act as a cosolvent to create semi-miscible systems).
• Thermal stability: stable up to typical processing temperatures (it can be handled at 150-200 °C in short processes without significant degradation); under extreme conditions of prolonged heating in air it may undergo slow oxidation at high temperatures.
• Chemical stability: stable at pH 4 to 10 at room temperature; resistant to hydrolysis under normal conditions of use.
• Hygroscopicity: moderate to high; it absorbs ambient moisture and therefore must be stored in a closed container.
• Low volatility: very low vapor pressure at room temperature; it practically does not evaporate under normal conditions (unlike shorter glycols such as ethylene glycol or propylene glycol).
• Non-flammable under normal conditions (high flash point, typically above 180 °C).
• Low acute oral toxicity documented for the PEG family in international toxicological literature; safe handling profile under good industrial practices.
• Broad chemical compatibility with most surfactants, water-soluble polymers, salts, weak acids and bases, pigments, dyes and industrial additives.
• Lubricity: ability to reduce friction on surfaces, leveraged in aqueous lubrication, mold release and textile processing applications.
• Plasticization: ability to impart flexibility and workability to polymer systems and rigid materials.
• Humectant and carrier function: attracts and retains moisture, carries hydrophilic actives and modulates the controlled release of compounds in formulations.

Synonyms, Chemical Names and Search Terms Related to PEG 300

In the industrial cosmetics, chemical, textile, ceramics and manufacturing markets, PEG 300 is known by many chemical names, trade names and regulatory designations depending on the region and application. The most commonly used terms include PEG 300, PEG-300, PEG 6 (cosmetic INCI nomenclature), polyethylene glycol 300 (polietilenglicol 300), polietilén glicol 300, poly(ethylene glycol) 300 (the dominant English name in international technical literature), polyethylene glycol 300, macrogol 300 (a historical European and pharmacopeial name, although here we refer to the industrial grade), polyglycol 300, liquid PEG, short-chain PEG, polyethylene oxide 300 (a less common name), carbowax 300 (a historical Dow trade name), and in some contexts polyethylene glycol 300 (glicol polietilénico 300). On finished product labels it usually appears as "PEG 300" or "PEG-6", depending on the applicable regulatory format.

Likewise, in industrial purchasing, sourcing, formulation and product development, it is common to see searches such as PEG 300 price, buy PEG 300, PEG 300 Mexico, bulk polyethylene glycol 300, industrial grade PEG 300, cosmetic PEG 300, PEG 300 for textiles, PEG 300 for ceramics, PEG 300 lubricant, PEG 300 solvent, PEG 300 mold release, PEG 300 supplier Monterrey, liquid PEG supplier Mexico, industrial polyethylene glycol, PEG 300 vs PEG 400, difference between PEG 200 300 400 600, PEG 300 safety data sheet, PEG 300 technical data sheet, PEG 300 in bulk, PEG 300 price per kilo, PEG 300 humectant, PEG 300 emulsifier, industrial short-chain PEG, carbowax 300 Mexico, industrial macrogol 300, PEG 300 for industrial cosmetics or low molecular weight polyethylene glycol. These variations are especially relevant for cosmetic formulators, industrial chemists, textile technologists, technical ceramics formulators, plant engineers, chemical manufacturers, industrial buyers and product developers who need to identify the specific PEG grade for their formulations.

The Polyethylene Glycol (PEG) Family at Quimiconsult — Selection by Molecular Weight and Application

Quimiconsult distributes a family of liquid and semi-solid polyethylene glycols (PEG) covering the most widely used industrial options, so each formulator can select the optimal grade based on the required molecular weight, the desired physical state in the final formulation, the target viscosity and the specific application. Each PEG grade has characteristic properties determined by its average molecular weight, which directly defines its physical state, viscosity, hygroscopicity, lubricity and behavior in formulation:

• PEG 200 (average molecular weight 190-210 g/mol): the most fluid, lowest-viscosity liquid PEG in the standard commercial family, with the highest hygroscopicity, maximum water solubility and maximum solvent power for polar substances. A clear, low-viscosity liquid at room temperature. Ideal as a cosolvent, carrier for hydrophilic actives, humectant in liquid formulations, low-molecular-weight plasticizer and heat transfer agent in specific applications. Used in industrial cosmetics, chemical products, cleaning solutions, aqueous lubricants and applications that require minimal viscosity.
• PEG 300 (average molecular weight 285-315 g/mol) — the product described on this page: a viscous liquid PEG of low-to-intermediate viscosity, with an optimal balance of flowability, solvency, hygroscopicity and functional properties. It is one of the most versatile PEG grades and one of the highest-volume industrial grades worldwide, with applications in mold lubrication and release, fibers and textile processing, industrial cosmetics, technical ceramics, chemical product formulations, pigment and dye carriers, humectants and plasticizers.
• PEG 400 (average molecular weight 380-420 g/mol): a medium-viscosity liquid PEG widely used in cosmetics and industrial formulations for its balance of viscosity, humectant capacity and sensory properties. It is one of the most popular grades in industrial cosmetics thanks to its pleasant feel and compatibility with a wide range of ingredients. Ideal for industrial creams and lotions, hair care products, higher-viscosity aqueous lubricants, polymer plasticizers, carriers in industrial chemical formulations, and plasticizing ceramics and agglomerates.
• PEG 600 (average molecular weight 570-630 g/mol): sits on the boundary between liquid and semi-solid PEG at room temperature (its melting point is in the 17-22 °C range, meaning it is a viscous liquid in warm climates and may solidify in temperate or cold climates). Higher viscosity, lower hygroscopicity and a greater ability to add body and consistency to formulations. Ideal for formulations that require more consistency, high-viscosity lubricants, polymer plasticizers, carriers in pastes and gels, full-bodied cosmetic formulations, coatings and applications that call for a PEG with properties between liquid and solid.

Choosing among these PEG grades depends on three main factors: the physical state required in the formulation (liquid, semi-solid, solidifying function), the target viscosity of the formulated product and the balance of hygroscopicity, lubricity and sensory properties you want to achieve. It is common practice in industrial formulation to combine two or more PEG grades to achieve specific intermediate properties (for example, blending PEG 300 with PEG 600 to obtain a system with viscosity and consistency tailored to the application). For technical advice on selecting the optimal PEG grade for your specific formulation, contact our support team.

How Does PEG 300 Work in Formulation? — Functional Mechanisms

Unlike ingredients that serve a single function, PEG 300 delivers its value in formulation through several simultaneous mechanisms that make it one of the most versatile industrial polyols:

Universal solvency and cosolvency: the chemical structure of PEG 300, with its chain of hydrophilic ethylene oxide units and reactive terminal hydroxyl groups, allows it to solvate polar substances (salts, sugars, glycerin, alcohols, weak acids) and moderately nonpolar substances (some aromatics, esters, certain polymers) at the same time, acting as a molecular solubilizing bridge that makes it possible to formulate systems in which mutually incompatible ingredients coexist in a single homogeneous phase. This mechanism is the basis for its use as a carrier in complex formulations.

Humectancy and hygroscopicity: the many polar groups in the PEG chain (the oxygen atoms of the ether bonds) have a high affinity for water molecules through hydrogen bonding, which allows PEG 300 to capture moisture from the air and retain it in the formulation, as well as maintain hydration on treated surfaces (textiles, ceramics, skin in industrial cosmetics). This mechanism makes it effective as a humectant, anti-drying agent and water activity modifier.

Interfacial lubrication: PEG chains form thin films on solid surfaces, reducing friction between surfaces in contact. This mechanism is the basis for its use as a mold lubricant (where it forms a release film between the molded part and the mold surface, making it easier to release the product), a textile fiber lubricant (where it reduces friction during processing, improving quality and reducing breakage), and a lubricant for green ceramics (where it eases forming and reduces die wear).

Plasticization of polymers and rigid materials: PEG 300 inserts itself between the polymer chains of rigid matrices (resins, thermoplastic polymers, green ceramics, starches, agglomerates), physically separating the chains and reducing intermolecular interactions, which gives the plasticized material flexibility, workability and improved mechanical strength. This mechanism is central to its use in technical ceramics (where it improves formability and green strength before sintering), in polymer formulations and in powder agglomerates.

Rheological viscosity modulation: when incorporated into aqueous formulations, PEG 300 increases viscosity predictably and in proportion to its concentration, without significantly altering other key properties (pH, conductivity, clarity). It allows the viscosity of liquid products to be fine-tuned without resorting to thickeners that may alter other properties.

Carrier function and controlled release: in systems that need to transport an active ingredient (dye, pigment, surfactant, cosmetic ingredient, chemical additive) to a surface or release the active gradually, PEG 300 acts as a transfer carrier, modulating the release rate according to its concentration, molecular weight and interactions with the active.

Stabilization of emulsions and dispersions: although PEG 300 is not a primary emulsifier in the classic sense (it does not have the distinct polar head and nonpolar tail of a surfactant), it works as a co-emulsifier and stabilizer of the aqueous continuous phase, improving the stability of emulsions formulated with traditional surfactants.

Industrial Applications of Industrial Grade PEG 300

PEG 300 is one of the most versatile industrial polyols, with applications across many manufacturing sectors that take advantage of its unique combination of solvency, lubricity, hygroscopicity and chemical compatibility. Below we detail the main fields of application.

Mold Lubricants, Release Agents and Foundry

This is one of the traditional, highest-volume applications of industrial grade PEG 300. In molding, casting, injection and part-forming operations, PEG 300 works as a release agent and interfacial lubricant:

• Release of plastic, rubber and elastomer parts: applied to the mold surface before the operation, it forms a thin film that makes it easier to release the finished part without sticking, reducing surface defects and extending mold life.
• Mold lubrication for metal casting: especially in aluminum, zinc and low-melting-point alloy foundries, where it reduces metal-to-mold adhesion.
• Release of green ceramic and refractory parts: makes it easier to release the formed part before sintering.
• Thermoforming and blow molding operations: as a processing aid.
• Lubrication of dies and punches in stamping and forming operations.

Textile Industry and Fiber Processing

In the textile industry, PEG 300 is a processing aid used at multiple stages:

• Sizing and lubrication of synthetic and natural fibers: during spinning, winding and weaving, where it reduces friction and breakage, improving yield and quality.
• Dyeing auxiliaries and textile finishes: as a carrier for dyes and finishing agents, improving penetration and uniformity.
• Lubrication of textile machinery on parts that require water-soluble lubricants.
• Wetting and antistatic agent in the processing of synthetic fibers prone to static buildup.
• Aid in textile printing operations, as a viscosity modifier and pigment carrier.
• Pre-weaving and post-weaving treatments that require uniform fiber wetting.

Industrial Cosmetics and Industrial Grade Personal Care Products

In industrial cosmetics (industrially manufactured cosmetic products, high-volume personal care products, mass-market formulas), industrial grade PEG 300 is a common ingredient as a humectant, cosolvent, carrier and plasticizer:

• Industrial body creams and lotions: as a humectant and viscosity modifier.
• Hair care products (conditioners, industrial hair masks, styling products): improving combability and sensory feel.
• Industrial liquid soaps, shower gels and shampoos: as a carrier and feel modifier.
• Shaving products: industrial creams, foams and gels.
• Nail products: nail polish removers and care formulations.
• Industrial makeup: as a carrier and plasticizer in creamy formulations.
• Antiperspirants and deodorants: as a humectant and active carrier.
• Bath and bubble bath products: as a viscosity modifier.

Note: for cosmetic applications that require pharmaceutical or USP grade, check the availability of that specific grade with our technical team. This product is industrial grade.

Ceramics, Technical Porcelain and Refractories Industry

In technical ceramics, porcelain, refractories and agglomerated materials, PEG 300 plays key roles in the forming and processing stages prior to sintering:

• Plasticizer in ceramic pastes: improves workability and formability by extrusion, pressing or molding.
• Temporary binder in green ceramic bodies: provides green mechanical strength before firing and is removed by evaporation or pyrolysis during the thermal cycle.
• Lubricant in isostatic and uniaxial pressing operations: reduces internal friction and improves compact homogeneity.
• Carrier for ceramic colorants and glazes: improves dispersion and uniform application.
• Aid in spray granulation processes (spray drying) of ceramic powders.
• Applications in technical porcelain, ceramic electrical insulators, tiles, sanitaryware and refractories.

Chemical Industry and Chemical Product Manufacturing

In the chemical industry and the manufacture of formulated chemical products, PEG 300 has many applications:

• Industrial solvent and cosolvent in formulations that require high solvency with low volatility and relatively low toxicity compared with traditional organic solvents.
• Carrier in specialty chemical formulations (surface treatments, industrial cleaning products, maintenance formulations).
• Raw material for chemical synthesis: a precursor for producing functionalized PEG derivatives (esters, ethers, PEGylated surfactants).
• Wetting agent in industrial agrochemical formulations (subject to specific regulatory verification).
• Carrier for industrial inks, pigments and dyes.
• Additive in water-based adhesive and sealant formulations.

Water-Soluble Industrial Lubricants

PEG 300 is one of the base components of water-soluble industrial lubricants, a category of growing importance because of its environmental and handling advantages:

• Water-soluble cutting and machining fluids: as a lubricating additive in formulations for machining, milling, drilling and grinding.
• Chain and conveyor lubricants in the food industry (subject to regulatory verification specific to the grade used).
• Lubricants for cold-forming processes: stamping, deep drawing, wire drawing.
• Aqueous lubricants for parts that come into contact with water or humid environments where oil-based lubricants are not appropriate.
• Specialty water-soluble hydraulic fluids.

Applications in Inks, Adhesives, Coatings and Polymers

• Industrial and printing inks: as a pigment wetting agent, viscosity modifier and carrier.
• Water-based adhesives: as a temporary plasticizer and rheology modifier.
• Water-based coatings and paints: as an auxiliary coalescent and wetting agent.
• Polymer agglomerates: internal plasticizer.
• Encapsulation and microencapsulation: as a soluble polymer matrix in specific applications.

Additional Applications in Other Industries

• Paper industry: as a humectant and processing aid.
• Leather industry: in finishing and softening stages.
• Electronics industry: as a carrier in conductive pastes and ceramic dielectric formulations.
• Industrial water treatment: as an auxiliary dispersant in specific formulations.
• Concrete and construction additives industry: as an auxiliary plasticizer and rheology modifier.

Features and Competitive Advantages of Industrial Grade PEG 300

The widespread preference for PEG 300 over other industrial polyols and solvents rests on a combination of technical, handling and economic properties that have made it one of the standard polyols of global industry for decades:

• Broad-spectrum solvency: fully miscible with water and an effective solvent for many polar and moderately nonpolar substances.
• Liquid at room temperature: makes dosing, pumping, mixing and industrial handling easy without preheating.
• Low volatility: very low vapor pressure at room temperature; it practically does not evaporate during processing or storage, preventing losses and emissions.
• Non-flammable under normal conditions (high flash point), supporting safe handling in the plant.
• Low acute toxicity documented for the PEG family in international toxicological literature; safe handling profile under good practices.
• Broad chemical stability: stable at pH 4-10, resistant to hydrolysis under normal conditions.
• Broad chemical compatibility: compatible with most surfactants, water-soluble polymers, salts, weak acids and bases, pigments and industrial additives.
• Useful hygroscopicity: absorbs ambient moisture, providing humectant functionality in formulations that need it.
• Inherent lubricity: reduces friction on surfaces, useful in lubrication and mold release applications.
• Effective plasticization: gives flexibility and workability to rigid polymer systems.
• Predictable viscosity modulation: proportional, predictable rheological effect that is easy to adjust in formulation.
• Relatively low cost compared with specialty polyols or organic solvents.
• Global availability and broad industrial backing: a standard raw material available worldwide, with well-established supply chains.
• Partial biodegradability under suitable environmental conditions; a better environmental profile than many traditional organic solvents.

PEG 300 vs PEG 200 vs PEG 400 vs PEG 600 — Which One Should You Choose?

One of the most frequent questions in industrial formulation with polyethylene glycols is how to select the optimal grade for the application. Here is a technical selection guide for the four most widely used liquid and semi-solid grades:

Choose PEG 200 when: you need the lowest possible viscosity among liquid PEGs, maximum water solubility, maximum hygroscopicity, maximum solvent power for polar substances, minimal body added to the formulation, or when you want the most fluid PEG for pumping, fine dosing, heat transfer or as a pure cosolvent without significant viscosity modulation. It is the choice when "the PEG must be rheologically invisible" and serve only solvency and humectant functions.

Choose PEG 300 (the product described here) when: you need an optimal balance of flowability, solvency, hygroscopicity and functional contribution, with low-to-intermediate viscosity that allows easy industrial handling without losing functionality. It is the most versatile grade and the one used in the largest volumes, ideal for mold lubricants, textile fibers, technical ceramics, industrial cosmetics, chemical formulations and pigment carriers, and for the vast majority of applications that need neither the extremes of PEG 200 (maximum fluidity) nor of PEG 600 (semi-solid consistency).

Choose PEG 400 when: you need more viscosity and body than PEG 300 without reaching the semi-solid state of PEG 600, a better sensory feel in cosmetic applications, greater humectant power with lower ambient hygroscopicity (more stable under variable storage conditions), or when the specific application has historically been optimized for PEG 400 (many industrial cosmetic formulations and polymer plasticization use PEG 400 as the standard). It is the most popular grade in industrial cosmetics.

Choose PEG 600 when: you need a PEG with more consistency and body, properties at the liquid/semi-solid boundary at room temperature (its melting point is around 17-22 °C, meaning it is a viscous liquid in warm climates and may solidify in temperate or cold climates), lower hygroscopicity, and a greater ability to add structure and consistency. Ideal for high-viscosity lubricants, plasticizers for more rigid polymers, carriers in firm pastes and gels, and fuller-bodied formulations.

Recommended combinations: it is common practice in industrial formulation to blend two or more PEG grades to obtain specific intermediate properties. For example:

• PEG 300 + PEG 600 to achieve viscosity and body tailored to the application, with stability over a wide temperature range.
• PEG 200 + PEG 400 for systems with high solvency and moderate viscosity.
• PEG 300 + PEG 400 for cosmetic applications with a specific sensory profile.

For technical advice on selecting and combining PEG grades for your specific formulation, contact our technical support team.

Recommendations for Use, Dosage and Incorporation of PEG 300

To get the most functionality out of PEG 300 in industrial formulations, we recommend following a proper incorporation protocol:

How to incorporate: PEG 300 is liquid at room temperature, which makes it easy to incorporate directly by pumping, volumetric dosing or weighing. It is typically added to the aqueous phase of the formulation (its hydrophilic nature favors this route), although it can be added to mixed hydroalcoholic phases or glycol systems without any problem. In systems with a significant oil phase, PEG 300 is added to the aqueous phase before the emulsification process.

Incorporation temperature: no preheating is required in most applications. For systems processed hot (industrial cosmetic emulsions with a fatty phase, ceramic formulations that require hot mixing, etc.), it can be incorporated at 40-70 °C without affecting its functionality. For processes above 150 °C, avoid prolonged exposure to air to prevent slow oxidation.

Typical concentrations in the final formulation by industrial application

• Industrial mold lubricants and release agents: 5 to 30% (can be used neat or diluted in water depending on the lubricant design).
• Textile sizes and processing aids: 1 to 10% of the formulation, depending on fiber type and operation.
• Ceramic pastes and agglomerates (plasticizer / binder): 0.5 to 3% of ceramic powder weight.
• Industrial cosmetics (creams, lotions, gels): 1 to 15% depending on the desired function (humectant, carrier, viscosity modifier).
• Industrial hair care products: 1 to 5% of the formulation.
• Industrial liquid soaps, shampoos and bath products: 1 to 10% of the formulation.
• Cutting fluids and water-soluble lubricants: 2 to 20% of the concentrate.
• Industrial inks and printing formulations: 2 to 15% of the formulation.
• Water-based adhesives (temporary plasticizer): 0.5 to 5% of the formulation.
• Water-based coatings and paints: 0.5 to 3% of the formulation.
• Chemical synthesis and reaction medium: according to process design.

Mixing: PEG 300 is incorporated with standard moderate agitation (paddle or anchor agitator at medium speed). High shear is not required except in specific applications combining PEG with solid powders or pigments where fine dispersion is desired.

Performance verification: once the product has been formulated, we recommend running stability tests on the finished product (accelerated stability, temperature cycling, validation of viscosity and functional properties) to confirm the performance of PEG 300 in the specific formulation before scaling up to production.

PEG 300 Compatibilities and Incompatibilities

PEG 300 is compatible with most industrial ingredients: water and aqueous solutions in all proportions; alcohols (ethanol, methanol, isopropanol, butanol); other glycols (propylene glycol, butylene glycol, ethylene glycol, glycerin); other PEG grades (blends of PEG 200, 400 and 600 are widely used); anionic, nonionic and cationic surfactants in most combinations; water-soluble polymers (PVA, PVP, carboxymethylcellulose, hydroxyethylcellulose, natural and modified gums); organic and inorganic salts at moderate concentrations; weak acids and bases within the chemical stability range; mineral and organic pigments; water-soluble dyes; aldehydes and ketones in specific formulations; water-soluble flavors and fragrances; and standard preservatives (parabens, phenoxyethanol, isothiazolinones at regulated concentrations).

It requires special precautions or considerations with:

• Strong mineral acids at high concentration and elevated temperature: they can catalyze oxidative degradation or chain scission of PEG.
• Strong bases at high temperature: extreme conditions can cause side reactions.
• Strong oxidizing agents (concentrated hydrogen peroxide, high-concentration hypochlorites, peracetic acid, peroxysulfates): they can oxidize PEG chains, generating unwanted by-products and reducing functionality. Take special care in formulations with oxidizing actives.
• Transition metals at high concentrations (especially Fe, Cu, Mn): they can catalyze slow oxidation of PEG during prolonged storage, especially at high temperature. Consider using auxiliary antioxidants (tocopherols, BHT) in critical formulations.
• Pure aliphatic hydrocarbons, pure mineral oils and pure vegetable oils: PEG 300 is immiscible or only partially miscible with these phases. Formulations that combine PEG 300 with oils require appropriate surfactants and emulsification processes.
• Unprotected high-temperature atmospheres: prolonged exposure to air at temperatures above 150 °C can cause gradual oxidation; working under an inert atmosphere (nitrogen) or with antioxidants is advisable in prolonged thermal processes.
• Some plastic materials: certain polymers (especially some elastomers) can swell or be partially affected by prolonged contact with PEG; verify the compatibility of gaskets and seals before prolonged storage or transfer.

Storage, Packaging and Shelf Life of PEG 300

Industrial grade PEG 300 is offered in package sizes suited to different scales of industrial consumption, including drums, IBC containers (totes) and bulk tanker deliveries for large-volume users, with smaller sizes available for development, formulation and pilot testing. Specific package sizes, container formats and capacities are available upon request from our sales team.

To ensure product integrity and performance, we recommend storing it in its original closed container, in a cool, dry, well-ventilated place with controlled temperature (ideally 15-30 °C), away from heat sources, direct sunlight, incompatible materials and atmospheres with prolonged high relative humidity (PEG 300 is moderately hygroscopic and absorbs ambient moisture if left exposed to air, which can gradually alter its specifications, especially hydroxyl value and water content). Once opened, the container must be properly resealed between uses to preserve specifications.

For prolonged storage in hot or humid climates, we recommend an airtight seal and, in applications where purity is critical, consider storage under an inert nitrogen atmosphere to prevent slow oxidation and moisture absorption.

The product's shelf life under these storage conditions is typically 24 months from the date of manufacture, depending on the supplier's specification and lot. The official expiration date is shown on the original container and on the Certificate of Analysis for the corresponding lot. For lots that have been stored for a long time, we recommend verifying critical parameters (color, hydroxyl value, water content) before use in critical applications.

Safety, Handling and Regulatory Considerations

PEG 300 is a substance with a very low toxicological profile, documented in international toxicological literature for the entire PEG family, with a long history of safe industrial use. Typical GHS safety classifications for industrial grade PEG 300 indicate minimal hazards under normal handling conditions: it is not corrosive, not flammable at room temperature, causes mild eye and skin irritation upon prolonged direct contact, and may irritate the respiratory tract if mists are inhaled at high concentrations.

The recommended personal protective equipment (PPE) during industrial handling includes safety glasses to prevent eye contact, chemical-resistant gloves (nitrile, neoprene) to prevent prolonged skin contact, appropriate work clothing, a mask during operations that generate mists or aerosols, and work in areas with adequate ventilation. In high-temperature operations, use appropriate thermal PPE.

Spill management: PEG 300 spills are slippery (high inherent lubricity) and pose a fall risk. Collect with inert absorbents (vermiculite, sand, diatomaceous earth) and dispose of in accordance with current waste legislation. Wash the area with water and detergent to remove slippery residue.

Handling of empty containers and waste: dispose of in accordance with current waste legislation. Under most regulations, PEG waste is not classified as hazardous in typical commercial quantities, although it may require treatment prior to final disposal.

From a regulatory standpoint (general considerations for industrial grade):

• PEG family: widely recognized as a standard industrial raw material with a documented safety profile.
• Industrial applications: industrial grade PEG 300 is suitable for the uses described on this page (lubricants, textiles, ceramics, industrial cosmetics, industrial chemical formulation). It is not suitable for pharmaceutical use, direct food use for human consumption, or injectables, applications that require specific USP/pharmacopeia grades not covered on this page.
• REACH regulation (European Union): polyethylene glycol is registered under the REACH regulation as an industrial chemical substance.
• GHS labeling: according to the lot's safety data sheet (SDS).

For applications that require pharmaceutical grade (USP/NF), food grade (FCC) or additional specific certifications, check the availability of the appropriate grade with our technical team, since the grade described on this page is strictly industrial.

Certifications and Regulatory Compliance

The industrial grade PEG 300 we distribute comes with a lot-specific Certificate of Analysis (CoA) documenting the critical parameters: average molecular weight, hydroxyl value, water solubility, aqueous solution pH, density, residual free ethylene oxide and free ethylene glycol and diethylene glycol content. Where applicable to the specific lot and supplier, supplementary documentation is available, such as statements of origin, statements of absence of specific substances, the safety data sheet (SDS) and technical support for inclusion in customer operational and quality files.

Formulators, technical departments, quality assurance, purchasing and product developers can request the complete technical documentation: technical data sheet (TDS), safety data sheet (SDS), lot-specific certificate of analysis (CoA), specific technical statements, and technical support for inclusion in supplier approval files and operational records.

Frequently Asked Questions about Industrial Grade PEG 300

What is PEG 300 and what is it used for?

PEG 300 (Polyethylene Glycol 300) is a liquid polymer in the polyethylene glycol family, with an average molecular weight between 285 and 315 g/mol. It is widely used in industrial cosmetics, textiles, ceramics, chemicals, manufacturing, industrial lubrication, ink and adhesive formulation, water-based coatings, foundry and molding, as a mold lubricant and release agent, humectant, cosolvent, plasticizer, viscosity modifier, carrier for pigments and actives, and hygroscopic agent. It is one of the most versatile industrial polyols thanks to its combination of solvency, lubricity, hygroscopicity and broad chemical compatibility.

What is the difference between PEG 200, PEG 300, PEG 400 and PEG 600?

The main difference is the average molecular weight, which directly determines physical state, viscosity and functional properties. PEG 200 is the most fluid and lowest in viscosity, with maximum hygroscopicity and maximum solvent power. PEG 300 has low-to-intermediate viscosity and is the most versatile of the liquid family. PEG 400 has more viscosity and body than PEG 300 and is widely used in industrial cosmetics. PEG 600 sits at the liquid/semi-solid boundary at room temperature (approximate melting point 17-22 °C), with more consistency and lower hygroscopicity. The choice among them depends on the target viscosity, the required physical state and the balance of functional properties sought in the formulation.

Is PEG 300 soluble in water?

Yes, PEG 300 is fully miscible in water in all proportions, at room temperature (20 °C) and above. This universal solubility is one of its most useful characteristics, allowing it to be incorporated into any aqueous formulation without dispersion or phase separation problems. It is also soluble in alcohols, other glycols, acetone, DMSO and many polar organic solvents. It is immiscible with saturated aliphatic hydrocarbons, pure mineral oils and pure vegetable oils, but it can coexist with these phases in emulsified systems.

Is PEG 300 the same as glycerin or propylene glycol?

No, they are different products, although they share some functional properties (humectancy, solvency, water miscibility). Glycerin (glycerol) is a simple low-molecular-weight triol (92 g/mol), more viscous, sweeter tasting and with greater humectant capacity per gram. Propylene glycol is a short-chain diol (76 g/mol), a free-flowing liquid with good solvency. PEG 300 is a higher-molecular-weight polymer (285-315 g/mol) with properties between those of simple glycols and high-molecular-weight solid PEGs, offering unique combinations of rheological, lubricating and plasticizing properties that simple glycols do not provide. In many formulations they are used in combination, taking advantage of their complementary properties.

Is PEG 300 safe? What does the toxicological literature say?

The PEG family in general, including PEG 300, has a history of safe industrial use documented over decades and a low toxicological profile in industrial applications under good handling practices. International regulatory authorities have repeatedly evaluated the safety of PEGs, particularly USP/pharmacopeia grades for human applications. The industrial grade PEG 300 we distribute is intended for industrial applications (lubrication, textiles, ceramics, industrial cosmetics, chemical formulation), where its safety profile under standard industrial handling is well known. For applications involving human oral use, pharmaceutical applications or USP/FCC requirements, check the availability of the appropriate specific grade.

Why are free ethylene oxide and free glycols in the specification?

Ethylene oxide and short glycols (ethylene glycol, diethylene glycol) are residual by-products of the polymerization process that produces PEG. The specifications of maximum 10 ppm free ethylene oxide and maximum 0.25% ethylene glycol + diethylene glycol are standard purity parameters in the PEG industry, ensuring the product meets quality criteria for industrial applications. These limits are well below typical industrial safety thresholds for these compounds. For applications that require stricter limits (pharmaceutical or food grade), special grades with more rigorous specifications exist; check availability.

Can PEG 300 be blended with other PEG grades?

Yes, without any problem, and in fact it is common practice in industrial formulation. Blends of different PEG grades (for example PEG 300 + PEG 600, PEG 200 + PEG 400, PEG 300 + PEG 400) make it possible to obtain specific intermediate properties that no single grade provides: tailored viscosity, a hygroscopicity/consistency balance, a specific sensory profile, and modulation of any functional parameter. The different PEG grades are chemically compatible with each other and blend without separating. For advice on specific combinations, contact our technical team.

How is PEG 300 used as a release agent or mold lubricant?

PEG 300 is used as a release agent and interfacial lubricant by applying it to the mold surface before the molding, casting or forming operation. It can be applied neat (in applications that tolerate its viscosity) or diluted in water at typical concentrations of 5-30%, depending on the specific lubricant design. It can be applied by spraying, brushing, dipping or rolling, depending on the mold geometry and type of operation. It forms a thin film that makes it easier to release the finished part without sticking, reduces surface defects and extends mold life. For specific applications (plastic molding, aluminum casting, ceramic pressing), we recommend a dedicated formulation that may combine PEG 300 with other components (other PEGs, surfactants, defoamers, preservatives).

Is PEG 300 hygroscopic? How should it be stored?

Yes, PEG 300 is moderately hygroscopic, which means it absorbs ambient moisture if left exposed to air. This can gradually alter its specifications (especially hydroxyl value and water content). To preserve quality, store it in its original, tightly closed container, in a cool, dry, well-ventilated place at 15-30 °C, away from prolonged high ambient humidity. Once opened, reseal between uses. For applications where purity is critical, consider storage under an inert nitrogen atmosphere. Typical shelf life: 24 months from the date of manufacture under suitable conditions.

Does PEG 300 evaporate? Is it volatile?

It is not volatile. PEG 300 has a very low vapor pressure at room temperature and practically does not evaporate under normal processing or storage conditions. This is a significant advantage over traditional volatile organic solvents (ethanol, isopropanol, acetone) in formulations where evaporation losses would affect yield, cost and emissions. At elevated temperatures (>150 °C in thermal processes), slow evaporation and oxidation may occur; in these cases an inert atmosphere or the use of antioxidants is recommended.

What is the difference between industrial grade PEG 300 and PEG 300 USP?

The industrial grade PEG 300 (the product we distribute on this page) meets purity and quality specifications appropriate for industrial applications: mold lubricants, textiles, ceramics, industrial cosmetics, chemical formulation and manufacturing. PEG 300 USP is a pharmaceutical grade that meets the USP (United States Pharmacopeia) monograph, with stricter specifications for purity, impurity control (residual ethylene oxide, free glycols, heavy metals), microbiology and traceability, required for pharmaceutical and medical applications or wherever regulations demand it. Industrial grade is not a substitute for USP grade in regulated applications. If your application requires USP grade, check availability with our technical team to identify the right product.

Where can I buy PEG 300 in Mexico and at what price?

At Quimiconsult we distribute industrial grade PEG 300 with availability from our warehouse in San Nicolás de los Garza, Nuevo León, serving customers throughout Mexico. We offer package sizes ranging from laboratory samples, industrial drums and IBC containers to bulk tanker deliveries for large-volume users, with complete technical documentation (TDS, SDS, lot-specific CoA) and formulation technical support. We also distribute PEG 200, PEG 400 and PEG 600 from the same family for formulators who need the full line or specific blends. The price of industrial grade PEG 300 depends on volume, package size and specification. Request a personalized quote stating your estimated volume, application sector and required specifications through our website or by phone at +52 (81) 8105 0063.

Request Your Quote for Industrial Grade PEG 300 or Our Full PEG Line

Does your industrial cosmetics plant, textile mill, ceramics or technical porcelain plant, foundry or molding shop, chemical manufacturing plant, lubricant and industrial fluid manufacturer, ink, adhesive and coating manufacturer, or any industry that needs a highly versatile multifunctional polyol need to incorporate industrial grade PEG 300 into its processes or formulations? We also offer PEG 200, PEG 400 and PEG 600 from the same family so you can select the optimal grade or develop specific blends that combine the properties of several grades. Contact us and we will gladly analyze your specific application, recommend the optimal grade, the right dosage and the most efficient combination for your formulation, provide formulation and handling technical support, and deliver a comprehensive solution that includes complete technical documentation, incorporation guidance and on-time delivery anywhere in Mexico.

Related Products and the Polyethylene Glycol Family

Explore our complete family of polyethylene glycols (PEG) and other complementary industrial polyols for industrial cosmetic, textile, ceramic, chemical, lubricant and manufacturing formulation:

• PEG 200 — lowest-viscosity liquid polyethylene glycol with maximum hygroscopicity
• PEG 400 — medium-viscosity liquid polyethylene glycol, the standard in industrial cosmetics
• PEG 600 — polyethylene glycol at the liquid/semi-solid boundary, with more consistency and body
• Industrial Propylene Glycol — simple low-viscosity glycol, cosolvent and humectant
• Industrial Glycerin — humectant triol with high water-retention capacity
• Industrial Ethylene Glycol — low-molecular-weight glycol for specific applications
• Butylene Glycol — longer-chain glycol with a humectant and solvent profile
• Sorbitol — solid humectant polyol for specific applications

Related categories:

• Category: Polyethylene Glycols (PEG Family)
• Category: Industrial Glycols and Polyols
• Category: Industrial Solvents and Cosolvents
• Category: Humectants and Plasticizers
• Category: Raw Materials for Industrial Cosmetics
• Category: Textile Processing Auxiliaries
• Category: Additives for Ceramics and Refractories
• Category: Industrial Lubricants and Release Agents