Molekula
Methoxy polyethylene glycol (average Mn 350)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Methoxy polyethylene glycol (average Mn 350) is a short, hydrophilic polymer used in pharmaceuticals and cosmetics for solubilization and as a solvent, plasticizer and humectant, and as a chemical intermediate in PEGylation and in the preparation of surfactants and esters. It is a polyethylene glycol derivative with a methoxy group at one end, offering excellent solubility in water and organic solvents. This chemical has a CAS number of 9004-74-4 and the molecular formula CH3(OCH2CH2)nOH. It is stable at ambient storage conditions and carries no signal word for hazard classification. Molekula supplies Methoxy polyethylene glycol (average Mn 350) from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £30.90 per pack ex VAT · £37.08 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Colourless liquid |
| Colour (Pt-Co) | 0 - 80 |
| Water | <1.0% |
| Hydroxyl value (mgKOH/g) | 140 - 180 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 268 °C |
Identification
| Property | Value |
|---|---|
| SKU | 90026586 |
| CAS Number | 9004-74-4 |
| Molecular Formula | CH3(OCH2CH2)nOH |
| Molecular Weight | N/A |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 3907.29.00.00 |
| Tariff Code | 3907291190 |
Safety & GHS
Detailed safety information available in the SDS — see Documents below.
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is Methoxy polyethylene glycol (average Mn 350) commonly used for?
This product is widely used as a solvent, solubilizer, plasticizer, humectant, and excipient in pharmaceutical formulations and cosmetics, and as a reagent and intermediate in organic synthesis, for example in PEGylation and as a precursor for surfactants and esters.
What is the chemical formula and molecular weight of Methoxy polyethylene glycol (average Mn 350)?
The chemical formula is CH3(OCH2CH2)nOH, where n varies to achieve an average molecular weight of 350 g/mol (nominal).
How should Methoxy polyethylene glycol (average Mn 350) be stored?
Store in a tightly sealed container at ambient temperature, away from direct sunlight and moisture.
What grades or purity levels of Methoxy polyethylene glycol (average Mn 350) does Molekula supply?
Molekula supplies this product in pharmaceutical-grade and industrial-grade purity, with full documentation available upon request.
Can Molekula supply Methoxy polyethylene glycol (average Mn 350) in bulk quantities?
Yes, we offer bulk quantities (minimum order quantities vary by grade—contact us for details and pricing).
What documentation comes with an order of Methoxy polyethylene glycol (average Mn 350)?
Each order includes a Certificate of Analysis (CoA), Safety Data Sheet (SDS), and batch-specific documentation for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.