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Property: black red with acidity
Uses: silver analysis, sugar testing, for the preparation of dye, ink, polymerization catalyst, mordant, water purifier
Enterprise standard: Factory standard
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Ordinal
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The　examination iterm
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Factory standard
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1
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Appearance
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(Black-red liquid)
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2
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Fe2(SO4 )3. 9H2O（content）
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≥50%
|
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3
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Fe3+（content）
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≥10%
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4
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(Insolubles in water)
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≤0.003%
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5
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(Cl-)(Chloride)
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≤0.0003%
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6
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(NO3-)(Nitrate)
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≤0.001%
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7
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(Mn)
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≤0.003%
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8
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(Fe2+)
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≤0.0005%
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9
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(Zn)
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≤0.002%
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10
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(Cu)
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≤0.001%
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11
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(Pb)
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≤0.0005%
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