Characteristics A white, crystalline powder Complies

Identification Positive reaction Complies

Loss on drying ≤0.5% 0.20%

Melting Point 134~136℃ 134.4~135.5℃

Appearance of solution Clear (2.2.1), Colorless (Method II, 2.2.2)

Complies

Acidity or alkalinity ≤0.4ml 0.01mol/L NaOH 0.05ml

Heavy metals ≤20ppm Complies

Sulphated ash ≤0.1% 0.04%

Related substances ≤1.0% Complies

Chlorides ≤400ppm Complies

Assay 98.5~101.0% 99.32%