English name: Paraformaldehyde; Polyoxymethylene
CAS number: 30525-89-4
Structural formula:
Molecular formula: HO-(CH₂O)n-H, n=10-100
Appearance and properties: Low molecular weight white crystal powder with formaldehyde smell
Molecular weight: (30)n
Vapor pressure: 0.19kPa/25℃
Flash point: 71℃
Melting point: 120～170℃
Solubility: insoluble in ethanol, soluble in dilute acid and alkali, slightly soluble in cold water, more soluble in hot water
Density: relative density (water = 1) 1.39; relative density (air = 1) 1.03
Stability: stable
Hazard marking: Class 4.1, flammable solid
Storage conditions: 2-8°C