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          CAS number: 50-78-2

          Molecular formula:

          molecular weight:

          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 
          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
          Loss on drying 0.5% 0.03%
          Sulphated ash 0.1% 0.03%
          Assay (dried substance) Contains C9H8O99.5% TO 101.0% 99.70%
          Conclusion: The product comply with the requirements of BP2010