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Description
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A very fine, light, white powder. 15 g occupies a volume of about 150 ml
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Solubility
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Practically insoluble in water; insoluble in ethanol (95 %). It dissolves in dilute acids with a most slight effervescent
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Identification
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-
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Identification 'A'
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Bulk density - Not more than 0.15 g per ml
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Identification 'B'
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Solution should give reaction (A) of magnesium salts
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Appearance of solution
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Solution A should not more intensely color than reference solution BS2
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Arsenic
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NMT 4 ppm
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Iron
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NMT 0.1%
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Chlorides
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NMT 0.125 %
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Sulphates
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NMT 1.0 %
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Calcium
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NMT 1.5 %
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Soluble substance
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NMT 2.0 %
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Substance insoluble in acetic acid
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NMT 0.1 %
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Loss on ignition
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NMT 8.0 %
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Assay (on ignited basis)
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98.0 – 100.5%
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