|
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 standard：GB/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.
