Indicator
Chemical name:Cobalt Magnesium sulfate Reference Standard:GB 32449-2015 Molecular formula:MgSO4·nH2O,n=1/n=7 Appearance:Magnesium Sulfate heptahydrate is colorless crystal, and magnesium sulfate monohydrate is white powder Physical and Chemical indicator:
Item
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Indicator
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MgSO4·7H2O
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MgSO4·H2O
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MgSO4·H2O
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Magnesium sulfate
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≥98.4
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≥85.5
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≥91.2
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Total arsenic (subject to As),%
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≥9.7
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≥15.0
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≥16.0
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Arsenic (As),mg/kg
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≤2
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Pb (subject to Pb), mg / kg
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≤3
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Cd(subject to Cd),mg/kg
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≤1
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Hg(subject to Hg),mg/kg
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≤0.1
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Fineness
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W=900μm≥95%
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W=400μm≥95%
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W=400μm≥95%
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Water content
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–
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≤3%
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≤3%
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