Information
Specification category:
Product No. | Product name | specifications |
1.17767.014 | Paraformaldehyde | AR500g |
|
Characteristic:
Appearance and properties:low molecular weight is a white crystalline powder, with smell of formaldehyde.
Relative density(water=1) :1.39
Relative vapor density(air=1):1.03
Melting point(℃):120-170
Concentration:pure product
Saturated vapor pressure:0.19(25℃)
Solubility:insoluble in ethanol, slightly soluble in water, soluble in dilute acid, dilute alkali.
Combustion heat(kJ/mol):510.0
Technical indicators:
Item | AR | CP |
Assay | ≥95.0% | ≥94.0% |
Solubility test in ammonia | Pass | Pass |
Acidity and alkalinity | Pass | Pass |
Residue on ignition(as SO4) | ≤0.1% | ≤0.5% |
Chloride | ≤0.002% | ≤0.005% |
Sulfate | ≤0.01% | ≤0.02% |
Iron | ≤0.005% | ≤0.01% |
Heavy metals | ≤0.002% | ≤0.003% |
Sulfuric acid test | Pass | Pass |
|
Hazard characteristics:
IATA-DGR UN 2213 PARAFORMALDEHYDE,4.1,Ⅲ