Appearance

White crystalline powder

Identification A,B

Positive

Melting Point

198-200 °C

Loss on drying

≤ 0.5%

Residue on ignition

≤ 0.1%

Selenium

≤ 0.003%

Heavy metals

≤ 0.002%

Related Substances

≤ 0.5%

Organic Volatile impurities

≤ 0.5%

Assay

98.0-101.0%