Aspirin

CAS number:50-78-2

Molecular formula:C9H8O4

molecular weight:180.16

Chemical structure:

Product Name ASPIRIN
Shelf life 3 years
Test items Specifications  Results 
Characters  White crystal or crystalline powder slightly Complies 
Soluble in water and Freely soluble in alcohol(96%) Complies 
At about 143 142.8
Identification A Sample Infrared absorption spectropho-tometry Complies with Aspirin CRS Complies 
Identification B A crystalline precipitate is formed, Melting point is 156-161 Postive 
156.4-160.1
Appearance of solution Solution is clear and colourless Solution is clear and colourless
Related substances Any impurities not more than 0.1% 0.03%
The sum of impurities not more than 0.25% 0.06%
Heavy metals  20ppm 20ppm
NMT20ppm
Loss on drying 0.5% 0.03%
NMT0.5%
Sulphated ash 0.1% 0.03%
NMT0.1%
Assay (dried substance) Contains C9H8O99.5% TO 101.0% 99.70%
Conclusion: The product comply with the requirements of BP2010