Item

Specification

Appearance

A white crystalline powder, Odourless, almost tasteless

Solubility

Very slightly soluble in water; freely soluble in ethanol and acetone or chloroform

Identification

Conform

Melting point

131℃~136℃

Specific optical rotation

+4.5° ~ +6.5°

PH value

3.5~4.5

Water content

≤0.5%

Chlorures

≤0.02%

Sulfated ash

≤0.1%

Heavy metals

≤0.002%

Related substances

Conform

Assay

98.0%~102.0%