Item

Specifications

Description

White crystalline powder

Identification

IR absorption

Comparing with the spectrum obtained with metamizole sodium CRS

Reaction of sodium

Complies

Appearance of solution

Clear and not more intensely colored than reference solution BY6

Residual solvents: ethanol

≤1000ppm

Acidity of alkalinity

Not more than 0.1ml 0.02M NaOH change the color of the indicator to pink

Sulphates

≤0.1%

Heavy metals

≤20ppm

Loss on drying

4.9-5.3%

Related substances

Impurity C

≤0.5%

Any other impurity

≤0.2%

Total all impurities

≤0.5%

Assay

99.0-100.5%