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Description
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A very fine, pale buff or cream-coloured to greyish-white powder, free or almost free from gritty particles
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Solubility
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Insoluble in water but swells into a homogeneous mass; insoluble in, and does not swell in, organic solvents
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Identification
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A gelatinous precipitate should produced
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pH
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9.0 to 10.5
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Sedimentation value
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After 24 hours the volume of the clear supernatant liquid should not greater than 2 ml
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Swelling power
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The apparent volume of the sediment at the bottom of the cylinder should not less than 24 ml
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Coarse particles
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NMT 0.5 per cent
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Microbial contamination
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1 g is free from Escherichia coli
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Loss on drying
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NMT 15.0%
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