Zinc Sulphate AR (Zinc sulphate-7-hydrate) 500Gram

PRODUCT CODE 695835
SYNONYMS Zinc sulphate-7-hydrate
C.I. NO. --
CASR NO. (7446-20-0)
ZnSO4
.7H2O
ATOMIC OR MOLECULAR FORMULA ZnSO4.7H2O
ATOMIC OR MOLECULAR WEIGHT 287.54
PROPERTIES Melting point100°C;loses 7HOHat280°C.

PARAMETER LIMIT
Description Colourless or white efflorescent crystals /crystalline powder.
Solubility 10% solution in water is clear and colourless.
Identification Passes test.
MinimumAssay(Complexometric) 99.5%
pH(5%soln.inwater) 4.4 – 5.6

MAXIMUM LIMIT OF IMPURITIES
Insoluble matter 0.01%
Chloride(Cl) 0.0005%
Calcium (Ca) 0.001%
Iron (Fe) 0.001%
Heavy metals (Pb) 0.003%
Manganese (Mn) 0.0003%
Nitrate (NO3) 0.002%
Alkali and alkaline
earth metals
0.9%