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Description
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White crystalline powder
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Assay (by HClO4 titration)
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Min 99%
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Insoluble matter
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Passes filter test
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Residue on ignition
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Max 0.3%
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Loss on drying (at 20°; vacuum)
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Max 0.5%
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Solubility (1 M in water)
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Complete, colorless
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pH (2% solution in water)
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9.4 - 9.8
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UV absorbance (at 280 nm; 10%; 1 cm; in water)
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Max 0.1
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Chloride (Cl)
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Max 0.005%
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Sulphate (SO4)
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Max 0.01%
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Iron (Fe)
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Max 0.001%
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Lead (Pb)
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Max 0.001%
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