白色片状结晶。溶于水熔点 280 °C (dec.)(lit.)
折射率 22 ° (C=1, 1mol/L HCl)
质量标准
Test Items??????????????????????????? ?Standard
Appearance??????????????????????? White fine crystals
Assay?????????????????????????? ???? ?98.0 to 101.0%
Melting point?????????????????????? ?280 °C (dec.)(lit.)?
Chloride (Cl)????????????????????? ? Not more than 0.10%
Heavy Metals (Pb)????????????? Not more than 10 PPM
Loss on Drying??????????????????? Not more than 0.20%
Residue on Ignition (Sulfate)? Not more than 0.20%