Characteristics

性状

White or almost white, crystalline powder

白色或类白色结晶性粉末

White crystalline powder

白色结晶粉末

Solubility

溶解性

Freely soluble in water and in glacial acetic acid，practically insoluble in acetone and alcohol.

易溶于水和冰醋酸，难溶于丙酮和酒精

Complies

符合规定

Identification

鉴别

Conform with BP2012

符合BP2012标准规定

Complies

符合规定

PH

7.0～8.0

7.40

Related substance

Liquid chromatography

相关物质

Impurity A：≤0.1%

0.065%

Impurity B：≤0.2%

0.068%

Any other impurity：≤0.1%

＜0.027%

All other impurity：≤0.2%

＜0.027%

Heavy metal

重金属

≤10ppm

＜10ppm

Chlorides

氯化物

≤140ppm

＜140ppm

Loss on drying

干燥失重

≤0.5%

0.2%

硫酸灰份

Sulphated ash

≤0.1%

＜0.04%

Assay

含量

99.0-101.0%

99.81%