Sulfamethazine sodium salt

Items of Test

Standard

Result of Test

Appearance

White or almost withe crystalline powder

Conforms

Identification A

The infraed absorption spectrum

Conforms

Conforms

B: the reaction of primary aromatic amines

Conforms

Conforms

C: The test of sodium

Conforms

Conforms

Melting point

About 197°C with decomposition

197.5-198.6

Clarity color of solution

Not more coloured than Y4

Clear,<Y4

Alkalinity

PH=10.0-11.0

10.7

Loss on drying

≤2.0%

0.70%

Related substances

≤0.5%

<0.5%

Assay

99.0%-101.0%

99.9%