Item

Specification

Result

Appearance

White or almost white，crystalline powder

White crystalline powder

Solubility

Freely soluble in water,very slightly soluble in ethanol(96 percent)

conforms

Identification test (A）

Up to the standard

conforms

Appearance of solution

Clarity of solution:10% water solution should be clear

conforms

Colour of solution:10% water solution should be not more intensively coloured than reference solution Y7

conforms

PH

5.9 ～ 6.4

6.1

Assay

98.5-101.0%

99.6%

Chlorides

≤75ppm

<75ppm

Heavy metals

≤10ppm

<10ppm

Loss on drying

≤0.5%

0.1%

Sulphated ash

≤0.1%

0.04%

Ninhydrin-positive substances  (TLC)

Up to the standard

conforms

Result: The product conforms to the standard of EP6.0.