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Appearance
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White crystalline powder
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Assay (as C6H6Na2O7.1½ H2O)
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98.0 - 104.0%
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Solubility
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Freely soluble in water & practically Insoluble in methanol
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Identification
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To comply BP
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pH (3% w/v solution in water)
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4.9 to 5.2
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Arsenic (As)
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Max. 0.0002%
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Heavy metal
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Max. 0.002%
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Chloride (Cl)
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Max. 0.033%
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Oxalate (as C2H2O4)
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Max. 0.015%
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Sulphate (SO4)
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Max. 0.12%
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Readily carbonisable substance
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Passes test
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