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Molecular formula: MgSO4·7H2O
Molecular weight: 246.48
CAS NO:10034-99-8
Properties: colorless columnar or granular crystal with bitter and salty taste. Relative density is 1.67. Easily soluble in water, slightly soluble in ethyl alcohol and glyrecin, insoluble in acetone.
Uses: as analytical reagent, precipitant for sulfate. It can also be used in pharmaceutical, printing and dyieng, papermaking, ceramic, and leather industries.
Standard: maximum assay of impurities is in %
| Specification/item |
Analytically pure-AR
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Chemically pure-CP
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High pure
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Assay (MgSO4·7H2O) /%
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≥99.0
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≥99.0
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≥99.0
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PH value(50g/L solution, 25℃)
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5.0~8.0
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5.0~8.0
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5.0~8.0
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Clarity test
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Qualified
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Qualified
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—
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Water insoluble matter
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≤0.005
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≤0.01
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≤0.015
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Chloride (Cl)
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≤0.0005
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≤0.001
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≤0.01
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Arsenic (As)
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≤0.0001
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≤0.0002
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≤0.0002
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Sodium (Na)
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≤0.005
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≤0.05
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—
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Calcium (Ca)
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≤0.02
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≤0.05
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—
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Manganese (Mn)
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≤0.001
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≤0.005
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—
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Iron (Fe)
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≤0.0005
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≤0.001
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≤0.0015
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Heavy metal (Pb)
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≤0.0005
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≤0.001
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≤0.001
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Packing: woven bag lined with plastic bag, kraft paper bag, or fiber drum, net weight is 25kg.
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