Copper Sulphate Pentahydrate
Molecular Formula:CuSO4.5H2O Molecular Weight:249.68 g/mol CAS NO.:7758-99-8
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Specification
Characters
It occurs as blue crystalline powder or transparent, blue crystals
IdentificationTest A
Test B
Test C
Specified Test. The precipitate dissolves and a dark blue color is produced.Loss on drying- 35.0% to 36.5%
It gives positive reaction for the test of sulfates.
Solubility
Freely soluble in water, soluble in methanol, practically insoluble in ethanol (96%)
Appearance of solution
Solution S is clear
Chloride
Not more than 100 ppm
Iron
Not more than 100 ppm
Lead
Not more than 50 ppm
Loss on drying
Between 35.0% to 36.50%, determined on 0.500g by drying in an oven at 250 + 10OC
Assay (By Titrimetry)
Not less than 99.0% and not more than 101.0% of CuSO4.5H2O