Ferrous Sulfate

Look at these fine green or glaucous crystals or powder, readily soluble in water, slightly soluble in alcohol. It is mainly used to make pigment such as Ferric Oxide series products......

Molecular weight: 278.01
Molecular Formula: FeSO4.7H2O

Appearance: Light blue green crystal

Properties: Glaucous crystallization. The relative density 1.897, melting point degree into four 64 when water and salt, salt water into degree 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.
 

Test item	Specification
	Reagent grade	Pharmaceutical grade
Appearance	Conform	Conform
Assay /%	≥ 99.0-101.0	≥ 98.0-101.0
Water insoluble /%	≤ 0.005	≤ 0.02
Chloride (Cl)/%	≤ 0.001	≤ 0.005
N/%	≤ 0.001
Phosphate  (PO4)/%	≤ 0.0005	≤ 0.002
Arsenic  (As)/%	≤ 0.0002	≤ 0.0002
Manganese  (Mn)/%	≤ 0.05
Ferric (Fe)/%	≤ 0.02	≤ 0.10
Copper (Cu)/%	≤ 0.002	≤ 0.01
Zinc (Zn)/%	≤ 0.005	≤ 0.02
Lead (Pb)/%	≤ 0.002	≤ 0.005
Ammonia not sediment /%	≤ 0.05	≤ 0.2

 

Use: It is mainly used to make pigment such as Ferric Oxide series products (such as iron oxide red, Iron oxide black, Iron oxide yellow etc. ). It can also be directly used as the flocculant for waste water treatment, for purification of water, for producing ferric sulfate, for iron containing catalyst, or as additive in compound fertilizer, as well as for production of FeSO4. H2O.