Product Brief Introduction
Product name:Acetylsalicylic acid
CAS:50-78-2
MF:C9H8O4
MW:180.157
Product Specification
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Item |
Specification |
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Appearance |
White crystals, commonly tabular or needle-like, or white crystalline powder. |
|
Identification |
A.Infrared Absorption: The infrared absorption spectrum of the sample complies with the Aspirin RS. |
|
A crystalline precipitate is formed |
|
|
A violet-red color is produced |
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Solubility |
Freely soluble in alcohol, soluble in chloroform and in ether, sparingly soluble in absolute ether, slightly soluble in water, at about 143℃ |
|
Appearance of solution |
Clear and colorless |
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Substances insoluble in sodium carbonate TS |
The solution is clear |
|
Readily carbonizable substance |
No more color han M.F.Q |
|
Melting point |
156℃-161℃ |
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Loss on drying |
≤0.5% |
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Residue on ignition |
≤0.05% |
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Free salicylic acid |
≤0.1% |
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Sulfate |
≤0.04% |
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Chloride |
≤0.014% |
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Heavy metals |
≤10ppm |
|
Related Substances |
Impurity A ≤0.15% |
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Impurity B ≤0.15% |
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Impurity C ≤0.15% |
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Impurity D ≤0.15% |
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Impurity E ≤0.15% |
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Impurity F ≤0.15% |
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Unspecified impurities ≤0.05% |
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Total impurities ≤0.25% |
|
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Residual Solvents |
Acetic acid: LOD ≤0.5% |
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Assay (on dried basis) |
99.5%-100.5% |
