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Description
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A white or almost white powder, free from grittiness, readily adheres to the skin, unctuous to the touch
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Identification
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-
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Identification 'A' ( by IR)
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Passes test
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Identification 'B'
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A white, crystalline precipitate is formed
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Identification 'C'
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The residue obtained in identification test B gives the reaction of silicates
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Acidity or alkalinity
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The solution is not acidic and requires not more than 0.3 ml of 0.1M hydrochloric acid 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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NMT 2.0%
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Water soluble substances
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The residue weighs a maximum of 10 mg
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Carbonate (as CO3)
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No effervescence is produced
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Chlorides
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NMT 250 ppm
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Organic compounds
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The residue obtained in the test for Loss of drying is 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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Microbial contamination
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Passes test
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