Description

Methoxypolyethylene Glycols CAS NO 9004-74-4 are a versatile class of non-ionic surfactants and polymeric modifiers, characterized by a polyethylene glycol chain capped with a methoxy group. This structure provides excellent water solubility, low toxicity, and tunable physical properties based on molecular weight, making them critical for formulating stable and high-performance products. They are essential raw materials for manufacturers in the pharmaceutical, personal care, and industrial sectors seeking reliable rheology control, lubrication, or solubilization.

Application

• Pharmaceutical Excipients: Used as solubilizers, ointment bases, and tablet binders or coatings in drug formulations.
• Personal Care & Cosmetics: Act as humectants, emulsifiers, and viscosity modifiers in creams, lotions, and hair care products.
• Industrial Lubricants & Release Agents: Employed in metalworking fluids, mold release agents, and fiber lubricants due to their stability and lubricity.
• Chemical Intermediates: Serve as starting materials or modifiers for synthesizing more complex surfactants and specialty polymers.
• Textile & Leather Processing: Function as softeners, leveling agents, and dyeing assistants.
• Adhesives & Sealants: Used as plasticizers and rheology modifiers to adjust flow properties and flexibility.

Basic Information

Product Name	Methoxypolyethylene Glycols
CAS No.	9004-74-4
Molecular Formula	CH3O(CH2CH2O)nH
Molecular Weight	Variable (based on 'n', the degree of polymerization)
Synonyms	MPEG; Poly(ethylene glycol) methyl ether; Methoxy PEG; Polyoxyethylene monomethyl ether; α-Methyl-ω-hydroxypoly(oxy-1,2-ethanediyl); PEG monomethyl ether; Polyethylene glycol monomethyl ether; Methoxypoly(ethylene oxide)
EINECS	Contact for details

Quality Control

Our Methoxypolyethylene Glycols are manufactured under a strict quality management system. Each batch is tested against rigorous in-house specifications to ensure consistency in molecular weight distribution, hydroxyl value, and purity. Certificates of Analysis (COA) detailing key parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product properties.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid or solid (grade-dependent)
Identification (IR)	Conforms
Average Molecular Weight	As per grade (e.g., 350, 550, 750, 2000, 5000)
Hydroxyl Value	Contact for details
Water Content	< 1.0% (Karl Fischer)
pH (5% solution)	5.0 - 7.5

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.