Aspirin

items

Specifications

Characters

White   or almost white, crystal powder

Identification

A

violet-red   color is produced

B

Melting   point of salicylic acid 156℃-161℃

Appearance   of solution

Clear   and colorless

Heavy   metals

≤20ppm

Loss   on drying

≤0.5%  

Sulfate   ash

≤0.1%

Related   substances impurity A

≤0.15%

Impurity   B

≤0.15%

Impurity   C

≤0.15%

Impurity   D

≤0.15%

Impurity   E

≤0.15%

Impurity   F

≤0.15%

Unspecified   impurity

≤0.05%

Total   impurity

≤0.25%

Assay（on dried basis   ）

99.5%-101.0%