Ferrous Sulphate remove chromium


Ferrous Sulphate can be used as reducing agent to decrease chromate in cement. In the process of cement production, 900 ppm of ferrous sulphate can make hexavalent chromium (Cr6+) decrease to 2 ppm.


Chemical deposition:

Formula: H2Cr2O7+6FeSO4+6H2SO4=Cr2SO43+3Fe 2SO43+7H2




The harm of hexavalent chromium (Cr6+):

1.       Human skin and respiratory system will be harmed. Hexavalent chromium is also the dangerous carcinogens.

2.      Hexavalent chromium leaching out gradually from the cement, and dissolve in water, dissolving out for 7 months. After the rain, it will cause a large area of water pollution.


In California, hexavalent chromium be provision that cannot exceed 10 ppb. But it still 500 times of the 0.02 ppb recommended by The Office of Environmental Health Hazard Assessment (OEHHA).

The ROHS of European Union rules that the sum of Pb, Cd, Hg and Cr6+ in packing must less than 100 PPM.

Baise Johnson Chemical Co., ltd. focus on the production of Ferrous Sulphate for 20 years, our main product are Ferrous Sulphate Monohydrate (FeSO4·H2O) and Ferrous Sulphate Heptahydrate (FeSO4·7H2O). Johnson Chemical not only have great attention of product quality but also have competitive price. And already  authenticated by ISO9001 and Alibaba. If you have any inquiry please do not hesitate to contact us or visit us in China. 

Contact information:





     Email: info@johnsonchemical.com

Tel: 0086-771-2780078

Address: Baise Liutang Aluminium Industry Zone, Baise City, Guangxi, China PR.


The Application of Ferrous Sulphate in Cement Production Process

The application and chemistry of ferrous sulphate remove chromium in cement production process.