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Medical salicylic Acid
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Physical and Chemical Properties
White crystal or crystal powders,and sweets first and then hot,no chemical changes in the air.Atmospherically sublimation temperature over 76oC.Easily to decarboxylate and change into phenol and dioxide when heated atmospherically,and its aqueous solution appears acid reaction,becomes purple with FeCL3.Slightly dissolves in water but dissolves in boiling water easily.Dissolves in the ethanol or ether and slightly soluble in chloroform.
Specification
Appearance: | White crystal or crystal powders | ||
Color and clarity of solution: | Meet the requirement. | ||
Loss of drying: | ≤0.5% | Sulfate ash: | ≤0.1% |
Assay: | 99.0-100.5% | Moisture: | ≤0.40% |
Heavy metals: | ≤20ppm | Sulfate: | ≤200ppm |
M.P.: | ≥158oC | Phenol: | ≤0.10% |
Medical salicylic Acid
