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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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