Merck     聚乙二醇4000  PEG4000

产品说明：

Synonyms: Polyglycol, Polyethylene oxide, Polyoxyethylene, PEG4000

Formula: HO(C₂H₄O)_nH

Cas number: 25322-68-3

Chemical and physical data:

Ignition temperature………………………………>320℃

Melting point……………………………………53-58℃

Density…………………………………………1.2g/cm³(20℃)

Vapor pressure……………………………………<0.01hPa(20℃)

Solubility in water…………………………………500g/l(20℃)

Molar mass……………………………………………….3500-4500g/mol

pH value…………………………………………5-7(100g/l, H₂O, 20℃)

Flash point………………………………………270℃o.c.

Specification:

Hydroxyl value…………………………………………….25-32   Melting range

-lower value……………………………………≥58℃

-upper value……………………………………≤61℃

Average molecular mass………………………3500-4500

Identity(IR)…………………………………………………..passes test