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Appearance
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White or almost white, crystalline powder, colourless crystals or granules, efflorescent
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Assay (by NaOH titration)
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Min 99%
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Insoluble matter in water
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Max 0.01%
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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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Oxalate (as C2H2O4)
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Max 0.035%
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Heavy metal (as Pb)
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Max 0.001%
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Lead (Pb)
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Max 0.001%
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Iron (Fe)
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Max 0.001%
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Zinc (Zn)
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Max 0.001%
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Arsenic (As)
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Max 0.0001%
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Calcium (Ca)
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Max 0.02%
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Barium (Ba)
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Max 0.002%
|
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Reaction against H2SO4
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Passes test
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Water (H2O)
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7.5 - 8.8%
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Sulphated ash (at 600°C)
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Max 0.05%
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