Item

Specification

Data

Appearance

White or almost white crystalline powder or colourless crystals 

White crystalline powder

Identification

 A

 B

Ferric Acid reaction test

IR-Spectrum

Complies

Complies

Loss on drying

≤0.5%

0.1%

Rendily carbonizable substances

≤Fluid Q

＜Fluid Q

Residue on ignition

≤0.05%

0.03

Substances Insoluble in sodium caronate TS

Clear

Clear

Chloride

≤0.014%

＜0.014%

Sulfate

≤0.04%

＜0.04%

Heavy Metals

≤10 ug/g

＜10 ug/g

Limit of free salicylic acid

≤0.1%

＜0.1%

Assay

99.5% ~ 100.5%

100.2%

Residual Solvents

As per USP

Complies

Conclusion

Comply with USP33