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Appearance
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A greyish white to buff coloured powder
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Solubility
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Dissolves slowly, but almost completely in freshly boiled and cooled water
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Identification 'A'
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Passes IP test
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Copper (Cu)
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NMT 50 ppm
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Lead (Pb)
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NMT 50 ppm
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Zinc (Zn)
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NMT 500 ppm
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Manganese (Mn)
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NMT 0.1%
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Arsenic (As)
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NMT 3 ppm
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Basic Sulphate
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Passes IP test
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Ferric ion (Fe+3)
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NMT 0.5%
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Assay (as FeSO4)
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86.0 - 90.0%
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