产品描述

Appearance    White powder or granular
Assay (on dried basis)    99.0-100.5%
pH (10% Solution)    6.0- 9.0
Loss on drying (155℃, 4h)    =< 11.0%
Water insoluble matter    =< 0.3%
Formic acid, formates and other oxidizablesubstances (as formic acid)    =< 0.1%
Arsenic (As)    =< 3 mg/kg
Lead (Pb)    =< 5 mg/kg
Mercury (Hg)    =< 1 mg/kg
Heavy metals    =< 10 mg/kg
Chlorides (Cl)    =< 0.05%
Sulfate (SO4)    =< 0.06%
Nitrate (NO3)    Pass test
Organic volatile impurities    Pass test