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Description
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Colorless or faintly pink or faintly yellowish, crystals or crystalline masses; deliquescent
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Identifications
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-
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Identification 'A'
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A blue colour develops which become progressively more intense
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Identification 'B'
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A violet colour is produced which disappears on the addition of 5 ml of 2-propanol
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Identification 'C'
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A pale yellow precipitate is produced
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Appearance of solution
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Solution A is clear, and not more intensely coloured than reference solution BS6
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Acidity
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The solution is yellow
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Freezing point
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NLT -39.5 °C
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Non - volatile matter
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NMT 0.05%
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Assay
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99.0 -100.5%
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