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Description
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A colorless or slightly yellow liquid
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Solubility
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Miscible with chloroform, with ethanol (95 per cent) and with fixed and volatile oils, slightly soluble in water
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Identification
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-
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Identification 'A'
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The spectrum of sample should be concordant with spectrum of methyl salicylate IPRS/WS or with the reference spectrum
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Identification 'B'
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The principal peak in the chromatogram obtained with the test solution should corresponds to the peak in the chromatogram obtained with the reference solution
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Appearance of solution
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Solution should be clear, and not more intensely colored than reference solution YS7
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Acidity
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Not more than 0.4 ml of 0.1 M sodium hydroxide should require to restore the blue color
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Limit of salicylic acid, and dimethyl 4-hydroxy isophthalate
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-
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Salicylic acid
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NMT 0.1%
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Dimethyl 4-hydroxy isophthalate
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NMT 0.5%
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Refractive index
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1.534 - 1.538
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Weight/ mL
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1.175 g to 1.185 g
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Assay
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98.0 – 102.0% w/w
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