Poly(ethylene glycol) monomethyl ether [MW 1,900], also known as mPEG or PEG-MME, is a nonionic, water-soluble PEG derivative with one methyl-terminated end group and one hydroxyl end group. It is used in polymer modification, hydrophilic formulation work, coatings, dispersions, and specialty materials research.
Synonyms / related names: mPEG; PEG-MME; methoxy poly(ethylene glycol); poly(ethylene glycol) methyl ether.
This product has an average molecular weight specification of 1,900-2,100 Da and is supplied as a white to off-white powder to crystalline solid. Its hydrophilic PEG backbone and terminal hydroxyl functionality make it useful in formulation workflows where water solubility, polymer compatibility, and surface-property modification are important.
Researchers, formulators, and industrial users may use poly(ethylene glycol) monomethyl ether in coatings, polymer modification, dispersions, hydrophilic materials research, and the preparation of functional PEG-containing materials.
Key Properties
- Nonionic poly(ethylene glycol) monomethyl ether
- CAS Number: 9004-74-4
- Product Number: 04242
- Synonym: mPEG
- Linear Formula: CH3(OCH2CH2)nOH
- Molecular Weight: ~1,900
- Average Molecular Weight Specification: 1900-2100 Da
- Hydroxyl Value: 25.0-30.0 mgKOH/g
- Melting Point: 49.0-55.0°C
- Appearance: White to off-white powder to crystalline solid
- Soluble in water
- Recommended for laboratory reagent use and manufacture of substances
Applications
Polymer Modification
Poly(ethylene glycol) monomethyl ether may be used in polymer modification workflows where a hydrophilic PEG segment and terminal hydroxyl functionality are useful for material design or further functionalization.
Hydrophilic Coatings & Surface Treatments
mPEG may be evaluated in coating and surface treatment research where water compatibility, hydrophilicity, and polymeric surface behavior are important formulation considerations.
Dispersions & Colloidal Systems
This PEG derivative may be used in dispersion and colloidal formulation work where nonionic, water-soluble polymers are evaluated for compatibility, stabilization, and formulation performance.
Personal Care & Specialty Formulations
PEG-based materials are commonly evaluated in personal care and specialty formulations where water solubility, humectancy, texture, and polymer compatibility are relevant.
Hydrogel & Materials Research
Poly(ethylene glycol) monomethyl ether may be used in hydrophilic materials research, including PEG-containing polymer systems and hydrogel-related development where formulation compatibility is confirmed by the user.
Solubility & Compatibility Considerations
- Soluble in water
- Contains a methyl-terminated end group and a hydroxyl end group
- Compatibility depends on solvent system, pH, additives, polymer matrix, and processing conditions
- Hydroxyl value and average molecular weight should be considered when calculating formulation ratios or functionalization targets
- Evaluate compatibility with binders, surfactants, active components, fillers, and other additives before scale-up
Final performance should be confirmed under the user’s specific application conditions, including concentration, solvent system, temperature, substrate, and intended end use.
Preparation Tips
- Add gradually to water or a compatible formulation system with adequate mixing
- Allow sufficient time for complete dissolution or incorporation
- Use clean equipment to reduce contamination during formulation
- Consider hydroxyl value and molecular weight range when using this material for further reaction or modification
- Run small-scale compatibility trials before production or process transfer
Handling & Storage
- Store at room temperature
- Store in a well-ventilated place and keep cool
- Exercise normal care during handling
- Use good ventilation and wear appropriate personal protective equipment
- Wear protective gloves and safety glasses when appropriate
- Refer to the Safety Data Sheet before handling
Why Choose Polysciences?
Trusted by 6,000+ Researchers Worldwide
Cited in Thousands of Peer-Reviewed Studies
U.S. Manufacturing & Global Distribution
Reliable Delivery to 40+ Countries
FAQ
Click a question to expand.
1. What is Poly(ethylene glycol) monomethyl ether [MW 1,900] used for?
Poly(ethylene glycol) monomethyl ether [MW 1,900] is used in polymer modification, hydrophilic coating research, dispersions, specialty formulations, and PEG-containing materials development.
2. What is the molecular weight of this mPEG product?
The listed molecular weight is approximately 1,900, with an average molecular weight specification of 1900-2100 Da.
3. What is the hydroxyl value specification?
The product specification lists a hydroxyl value of 25.0-30.0 mgKOH/g.
4. Is Poly(ethylene glycol) monomethyl ether [MW 1,900] water-soluble?
Yes. The product page lists this product as soluble in water.
5. How should Poly(ethylene glycol) monomethyl ether [MW 1,900] be stored?
Store the product at room temperature in a well-ventilated place and keep cool. Review the Safety Data Sheet for complete storage, handling, and personal protective equipment guidance.
Safety & Documentation
Poly(ethylene glycol) monomethyl ether [MW 1,900] should be handled using good ventilation, protective gloves, safety glasses, and standard laboratory or industrial safety practices. The current SDS lists the product as not classified under GHS US classification. Refer to the Safety Data Sheet (SDS) and product specification for complete handling, storage, hazard, and technical information.
