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Zinc Sulphate Heptahydrate
ACS
Reagent
Ê
Item : Zn288A
ZnSO
4
·7H
2
O, FW=287.56
CAS No. 7446-20-0
Melting Point, 100°C
Density, 1.957
Index
Assay
99-103%
Manganese
<3ppm
Insoluble matter
<0.01%
Iron
<0.001%
Substns. not precip.
<0.2%
pH (5% solution)
4.4-6.0
Ammonium
<0.001%
Chloride
<5ppm
Nitrate
<0.002%
Sodium
<0.05%
Potassium
<0.01%
Magnesium
<0.005%
Calcium
<0.005%
Lead
<0.003%
Arsenic
<1ppm
.
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