Test

Specification

Characters

White or yellowish-white powder, Odorless or almost. hygroscopic

Identification

1.TCL: the RRT OF the main peak of sample solution should be the same as the RRT of the main peak of the standard solution 

2.Color reaction to p-bromoaniline: a vivid pink-red color develop

3.Test sulphate: it gives reaction of sulphate

pH

5.0- 7.5

Loss on drying

≤8.0%

Assay

≥600 μg/mg(DRY)