白色有光泽的鳞片状结晶或结晶性粉末。味甜水中溶解度(g/L):0℃时为7.97,25℃时为9.91,50℃时为14.06,75℃时为22.76,100℃时为42.06。90%乙醇中溶解度(g/L):1.3。不溶于乙醚。
Item | Standard |
Appearance | White powder |
State of Solution (Transmittance) | Not less than 95.0% |
Chloride (Cl) | Not more than0.02% |
Heavy metal(Pb) | Not more than 15ppm |
Arsenic(As2O3) | Not more than 2ppm |
Loss on drying | Not more than 0.20% |
Residue on ignition(sulfated) | Not more than 0.20% |
Assay | 98.0 to101.0% |