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Molecular formula: FeSO4·7H2O
Molecular weight: 278.05
CAS NO:7782-63-0
Properties: sky blue or green monoclinic crystal or crystalline powder. Relative density is 1.8987, melting point is 64℃. Soluble in water and glycerin, insoluble in alcohol.
Uses: as analytical reagent, water purifier, gas purification agent, mordant, herbicide, and etc.
Standard: maximum assay of impurities is in %
| Item |
Analytically pure-AR
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Chemically pure-CP
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High pure
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Assay
|
≥99.0
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≥98.0
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98.5-104
|
|
Water insoluble matter
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≤0.005
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≤0.02
|
——
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PH value
|
——
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——
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3.0-4.0
|
|
Nitrogen content (N)
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≤0.001
|
——
|
——
|
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Chloride (Cl)
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≤0.001
|
≤0.005
|
——
|
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Phosphate (PO4)
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≤0.0005
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≤0.002
|
——
|
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Arsenic (As)
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≤0.0002
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≤0.0002
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≤0.0002
|
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Manganese (Mn)
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≤0.05
|
——
|
——
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High iron (Fe)
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≤0.02
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≤0.10
|
——
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Copper (Cu)
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≤0.002
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≤0.01
|
——
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Zinc (Zn)
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≤0.005
|
≤0.02
|
——
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Lead (Pb)
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≤0.002
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≤0.005
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≤0.002
|
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Non-sludging to ammonium hydroxide (as sulfate)
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≤0.05
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≤0.2
|
——
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Magnesium (Mg)
|
——
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——
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≤0.002
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Titanium (Ti)
|
——
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——
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≤ 0.002
|
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Aluminum (Al)
|
——
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——
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≤0.02
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Packing: woven bag lined with plastic bag, kraft bag and fiber drum, net weight is 25kg.
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