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Polyethylene Glycol Monomethyl Ether MPEG-350 - High Solubility Emulsifier & Dispersant (CAS 9004-74-4)

Name: Polyethylene Glycol Monomethyl Ether MPEG-350 - High Solubility Emulsifier & Dispersant (CAS 9004-74-4)
Brand: Jienuo
Rating: 5.0 (65 reviews)

Polyethylene Glycol Monomethyl Ether MPEG-350 (also called Methoxy PEG 350) is a non-ionic polymer. It’s a colorless-to-light-yellow transparent liquid (at 25℃) with a pH of 5.0–7.0 and a hydroxyl value of 146–178 mgKOH/g. It boasts high solubility, thermal stability, and low volatility, serving as a versatile additive across industries.

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Model:
MPEG-350
Brand:
Jienuo

Product Description

Polyethylene Glycol Monomethyl Ether (MPEG-350)- Product Overview

Polyethylene Glycol Monomethyl Ether MPEG-350 (also known as Methoxy PEG 350 or m-PEG-350) is a non-ionic, low-molecular-weight polymer with a molecular weight of ~350 Da. It features excellent hydrophilicity, high solubility in water and polar solvents, and biocompatible, non-toxic properties. As a versatile industrial additive, it serves as an effective emulsifier, dispersant, plasticizer, and surfactant. Widely used in pesticide formulations, pharmaceuticals, coatings, cosmetics, and plastic processing, MPEG-350 enhances product stability, improves compatibility, and optimizes processing performance. Our high-purity MPEG-350 meets industrial and pharmaceutical standards, delivering reliable quality for diverse industrial applications.

Product Advantage

Excellent Physical & Chemical Stability
MPEG-350 shows low volatility and stable performance under heat (unlike ionic surfactants), with a controlled pH range (5.0–7.0) and hydroxyl value (146–178 mgKOH/g) — our batches maintain 99% consistency in key indices, meeting strict industrial standards.
High Compatibility & Solubility
It dissolves well in water, ethanol, and organic solvents, blending seamlessly with most raw materials (e.g., pesticide active ingredients, cosmetic bases). This eliminates compatibility issues in multi-component formulations.
Non-Ionic & Mild Property
As a non-ionic compound, it avoids the irritation risk of ionic alternatives, making it suitable for sensitive scenarios like pharmaceutical and cosmetic applications (e.g., skin care products).
Cost-Effective Versatility
A single MPEG-350 replaces multiple additives: it acts as an emulsifier, dispersant, and viscosity regulator, cutting formulation costs by 15–20% (based on customer feedback).

Technical Specifications

Parameter	Specification
Chemical Composition	Methyl, polyethylene glycol polymer
Product Type	Non-ionic surfactant/polymer additive
Appearance (at 25℃)	Colorless to light yellow transparent liquid
Molecular Weight	~350 Da (typical, batch-to-batch deviation ≤ 5%)
pH Value (1% aqueous solution)	5.0 – 7.0 (measured at 25℃)
Hydroxyl Value	146 – 178 mgKOH/g (ASTM D4274-16 standard test)
Solubility	Fully soluble in water, ethanol, and most polar organic solvents
Volatility	Low (vapor pressure < 0.1 Pa at 25℃)
Thermal Stability	Stable under 120℃ (no decomposition; slight viscosity change within 80–100℃)
Purity	≥ 99.0% (GC analysis)
Ash Content	≤ 0.1% (residue after 800℃ calcination)
Heavy Metal Content	≤ 10 ppm (Pb, Cd, Hg combined; ICP-MS test)

Product Uses

Cosmetics & Personal Care
It functions as a viscosity regulator and emollient in creams, lotions, and hair care products, enhancing texture and moisture retention without greasiness.
Pharmaceutical Industry
Used as a formulation auxiliary in ointments and topical drugs, its mild, non-irritating property ensures compatibility with skin and drug active ingredients.
Pesticide Formulations
Acts as an emulsifier and dispersant in pesticide mixtures, improving the stability and spreading ability of active ingredients on crops.

Product Operate Guide

For most applications: Add MPEG-350 directly to the formulation (dosage: 2–5% of total weight) and stir at 25–40℃ until fully dissolved. Adjust the amount based on specific product requirements (e.g., higher dosage for thicker cosmetics).

FAQ

What's the shelf life of MPEG-350?
It has a 2-year shelf life when stored in a dry, ventilated area (avoid moisture). Unopened packages maintain full performance within this period.
Is MPEG-350 toxic?
No. It's non-toxic and biocompatible, making it safe for use in cosmetics, pharmaceuticals, and other consumer-facing products.
Can MPEG-350 be used in food applications?
Our MPEG-350 is formulated for industrial/cosmetic/pharmaceutical use — it's not certified for food, so we don't recommend food applications.