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Chemical reagent
Ferrous sulfate, heptahydrate

Product name

Ferrous sulfate, heptahydrate

Specification

Reagent grade

Molecular formula

FeSO4·7H2O

CAS

7782-63-0

H.S. CODE

2833291000

Molecular weight

278.03

Appearance

Light green blue crystals

Package

25KG Woven bags or fiber drums

Property

Glaucous crystallization. The relative density 1.897, melting point ℃ into four 64 when water and salt, salt water into ℃ when 65. In the wet air oxidation as alkali type sulphuric acid easy high iron into yellow. Soluble in water, insoluble in alcohol. Aqueous easy oxidation.

Application

   Analytics reagents. DTC, polymerization catalysts. Also used in photoengraving, medium preparation.

Test standardGB/T 664-2011

Test items

Specification

AR grade

CP grade

Appearance

Light green blue crystals

Light green blue crystals

Assay

99.0-101.0%

98.0-101.0%

Water insoluble

0.005%

0.02%

Chloride

0.001%

0.005%

Total nitrogen

0.001%

 

Phosphate

0.0005%

0.002%

Arsenic

0.0002%

0.0002%

Manganese

0.05%

 

Ferric

0.02%

0.1%

Copper

0.002%

0.01%

Zinc

0.005%

0.02%

Lead

0.002%

0.005%

Substances not precipitated by ammonium

0.05%

0.2%

Storage

Do not store in direct sunlight. Store in a cool, dry area away from incompatible substances.



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