Sigma P6148   多聚甲醛  Paraformaldehyde

产品详细说明: 

Synonyms: Paraform, Polyoxymethylene

Formula: (CH₂O)_n

Cas number: 30525-89-4

Chemical and physical data:

Ignition temperature…………………………………370℃

Melting point…………………………………………….120-170℃

Density……………………………………………………..1.3g/cm³(20℃)

Vapor pressure………………………………………….1.5-2hPa(20℃)

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

Molar mass……………………………………………….20000g/mol

pH value…………………………………………………….4.0-5.5(10g/l, H₂O, 20℃)

Explosion limit……………………………………………260℃o.c.

Specification:

Assay (acidimetric after oxidation)……………..95.0-100.5%

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

Appearance of solution……………………………….passes test

In water insoluble matter(after hydrolysis)….≤0.1%

Acidity or alkalinity……………………………………..passes test

Heavy metals(as Pb)……………………………………≤0.001%

Methanol……………………………………………………≤3000ppm

Store below +15℃

Safety information:

R: 20/22-36/37/38-40-43

S:22-26-36/37