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Description
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A colourless or sightly yellow liquid
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Identification
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-
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Identification 'A'
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Violet colour develops
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Identification 'B'
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The precipitate melts at 156°C to 161°C
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Appearance of solution
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The solution is clear and not more intensely coloured 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 is required to restore the blue colour
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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 to 1.185
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Assay
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NLT 99.0% w/w and NMT 100.5% w/w of C8H8O3
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