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Appearance
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A white, or almost white powder, free from grittiness, readily adhere to the skin, unctuous to the touch
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Solubility
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Practically insoluble in water and in dilute solution of acids and in alkali hydroxides
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Identification 'A','B' & 'C'
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Passes IP test
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Acidity or alkalinity
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Not more than 0.3 ml of 0.1M HCl should be required to make it acidic
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Iron
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NMT 10 ppm
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Acid soluble substances
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Max 2.0%
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Water insoluble matter
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The residue weight a maximun 10 mg
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Carbonate
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No effervescence should be produced
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Chlorides
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Max 250 ppm
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Organic compounds
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The residue obtained in LOD test should not more than slightly yellow or grey
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Loss on drying (at 180°C; 1 hrs)
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NMT 1.0%
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