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Acetylsalicylic acid

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    Characters White crystal or crystalline powder.
    Identification A violet-red color is produced 
    Infrared absorption According with IR reference spectrum 
    Loss on drying Not more than 0.5% of weight 
    Readily carbonizable substance no more color than M.F.Q 
    Residue on ignition ≤0.05% 
    Substances insoluble in sodium carbonateThe solution is clear 
    Chloride ≤0.014% 
    Sulfate ≤0.04%
    Heavy metals ≤10ppm
    Free salicylic acid≤0.1%
    Organic volatile impurities Meets the requirement 
    Assay Contains C9H8O499.5%-101.0% 

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