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
|
chemically pure-cp
|
high pure
|
assay (mgso4·7h2o) /%
|
≥99.0
|
≥99.0
|
≥99.0
|
ph value(50g/l solution, 25℃)
|
5.0~8.0
|
5.0~8.0
|
5.0~8.0
|
clarity test
|
qualified
|
qualified
|
—
|
water insoluble matter
|
≤0.005
|
≤0.01
|
≤0.015
|
chloride (cl)
|
≤0.0005
|
≤0.001
|
≤0.01
|
arsenic (as)
|
≤0.0001
|
≤0.0002
|
≤0.0002
|
sodium (na)
|
≤0.005
|
≤0.05
|
—
|
calcium (ca)
|
≤0.02
|
≤0.05
|
—
|
manganese (mn)
|
≤0.001
|
≤0.005
|
—
|
iron (fe)
|
≤0.0005
|
≤0.001
|
≤0.0015
|
heavy metal (pb)
|
≤0.0005
|
≤0.001
|
≤0.001
|
packing: woven bag lined with plastic bag, kraft paper bag, or fiber drum, net weight is 25kg.
|