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Appearance
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White to almost white, crystalline powder or small flakes, melt at 270°C
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Assay (Potentiometric; on anhydrous basis)
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99.0-101.0%
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Solubility
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Sparingly soluble in water, very slightly soluble in alcohol. It dissolves in dilute acids and in dilute solutions of the alkali hydroxides
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Identifications
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To comply BP test
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Appearance of solution
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To comply BP test
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Loss on drying (at 105°C; 3 hrs)
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Max 0.5%
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pH (2% solution in water)
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5.4 to 6.1
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Chlorides
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Max 0.02%
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Sulphates
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Max 0.02%
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Heavy metal (as Pb)
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Max 0.002%
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Sulphated ash
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Max 0.1%
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Related Substances ( by TLC)
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To comply BP test
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