Product Name

: FERROUS SULFATE HEPTAHYDRATE

C.A.S. No.

: 7782-63-0

Molecular Formula

: FeSO₄.7H₂O

Molecular Weight

: 278.02 g/mol

SPECIFICATION

IP

BP

Description

Bluish green crystals or a light green, crystalline powder, odourless. Efforescent in air. On exposure To moist air, the crystals rapidly oxidize and become brown.

Bluish green crystals or a light green, crystalline powder, efforescent in air.

Solubility

-

Freely soluble in water, very soluble in boiling water, practically insoluble in ethanol (96 %) Ferrous sulfate heptahydrate is oxidized in moist air, becoming brown.

pH

3.0-4.0 ( 5 % w/v Solution)

3.0-4.0

Appearance of Solution

The solution is not more opalescent than opalescent Standard.

-

Identification

• Reaction
• Reaction
• Assay

• It gives reaction of sulfates
• It gives reaction of Ferrous Salt

• It gives reaction of sulfates
• It gives reaction of Irons
• It complies with limit of assay.

Chloride

NMT 250 ppm

NMT 200 ppm

Basic sulphate

Producing solution that is not more than turbid.

-

Arsenic

NMT 2 ppm

-

Lead

NMT 50 ppm

-

Mercury

-

-

Chromium

-

NMT 50 ppm

Copper

NMT 50 ppm

NMT 50 ppm

Ferric ions

NMT 0.5 %

NMT 0.3 %

Manganese

NMT 0.1 %

NMT 0.1 %

Nickel

-

NMT 50 ppm

Zinc

NMT 500 ppm

NMT 50 ppm

Organic volatile impurities

-

-

Residual Solvents

-

-

Assay

98.0 % - 105.0 %

98.0 % - 105.0 %