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Appearance
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White ganules or granules or powder. The pentahydrate is somewhat efflorescent.
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Solubility
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Freely soluble in hot water, soluble in water, slightly soluble inethanol (95%)
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Identification 'A' & 'B'
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Passes IP test
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Acidity or alkalinity
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A pink colour should be produced
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Arsenic (As)
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Max 0.0002%
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Iron (Fe)
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Max 80 ppm
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Chlorides
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Max 200 ppm
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Sulphates
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Max 0.15%
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Reducing substance
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A slight brick-red precipitate should be produced
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Loss on drying (at 120°C; 4 hrs)
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Max 30.0%
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Assay (as C6H10Ca06; on dried basis)
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98.0-102.0%
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