Item

Requirements

Test Results

Appearance

A white or almost white powder

Complies

Apperance of solution(5%in water)

Clear solution not more intense than 

referance solution BY7

Complies

Heavy metal(Pb)

≤  0.001 %

<0.001%

PH

1.2-1.8

1.3

Sulphated ash

≤ 0.2 %

0.03%

Loss on drying

≤ 0.5%

0.17%

Single related substance 

≤  0.2%

0.06%

Total impurities

≤ 0.3%

0.05%

Identity

Test A    (IR)

To comply

Complies

Reaction of chlorides

To comply

Complies

An absorption maximum at 231 nm

To comply

Complies

Assay

99%~ 100.5 %

99.8%