Item

Specification

Result                  

Appearance

White crystalline powder

Complies

Taste

Bitter

Bitter

Loss on drying

≤0.5%

0.21%

Residue on ignition    

≤0.1%

0.03%

Melting point

128-131 ºC

129-131  ºC

Ph

5.5-7.5

6.5

Heavy Metals

≤0.002%     

Complies

Assay    

98.0~100.0%

98.5%

Solubility

Easily soluble in water and ethanol, soluble in glycerin

Standard

Produce complies with USP29