SPECIFICATION

STANDARD

APPEARANCE

WHITE OR OFF WHITE POWDER

IDENTIFICATION

POSITIVE

CLARITY AND COLOUR OF SOLUTION

2.5% W/V MIXED SOLUTION IS CLEAR;COLOUR ≤BY6

ACIDITY AND ALKALINITY

REQUIRES 0.01M SODIUM HYDROXIDE VS NOT MORE THAN 0.2ml AND 0.01M HYDROCHLORIC ACID VS NOT MORE THAN 0.4ml.

RELATED SUBSTANCE

ANY SECOND SPOT IN SOLUTION 1.0% w/v IS NOT MORE THAN 0.25%

SULPHATE

≤80ppm

MELTING POINT

238~242℃

LOSS ON DRYING

≤0.50%

ASH

≤0.10%

ASSAY (ON DRY BASIS)

99.0~101.0%