Appearance

White crystal powder

Identification

Conformed to the standard

Acidity

Conformed

Melting point ℃

166-170

Solution clarification

Conformed

Chloride％

≤0.003

Sulphate％

≤0.01

Oxalate %

≤0.02

Loss on drying

≤0.5%

Residue on ignition

≤0.1%

Heavy metals

≤10mg/kg

Arsenic

≤2.0mg/kg

Assay

98.0-102.0%