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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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Identification
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The solution gives the reactions of magnesium salts
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Appearance of solution
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Solution 'A' is not more intensely colour than reference solution BS2
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Arsenic
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NMT 4 ppm
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Heavy metals
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NMT 30 ppm
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Iron
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NMT 0.1%
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Chlorides
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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 (at 900°C)
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NMT 8.0%
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Assay
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NLT 98.0% and NMT 100.5% of MgO, calculated on the ignited basis
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