Ferric Sulphate

Airedale Chemical Ferric Sulphate holds the formula Fe2(SO4)3 and is the sulphate of trivalent iron. It is an inorganic chemical compound that is used for increasing the rate of sedimentation in wastewater cleaning processes.

Airedale Chemical Ferric Sulphate is also known by many synonyms including Combiron, Copperas, Ferobuff, Ferric Persulfate, green salts, and Slow Fe. It is made by treating Sulphuric Acid (Available from Airedale Chemical) with an oxidizing agent.

The chemical compound means it contains a total of three naturally occurring chemical elements. Before use in its myriad industrial applications, the solution is prepared through oxidation, converting the ferrous iron within its composition into ferric iron. Stable iron concentrations in the resulting compound run up to 14%

Airedale Chemical Ferric Sulphate has a 12.5% Iron content and is a dark reddish-brown solution with a slight odour

Other Names: Ferric Sulfate, Sulfuric Acid, iron(3+) salt (3:2), Iron(III) sulfate

Grade: TECH

Strength: 12.5%

This product is available in the following sizes

  • 25L Drum
  • 200L Drum
  • Bulk Transfer



Medical uses as an astringent and styptic

Metal Processing

Used in pickling baths for aluminium and steel

Ferric Sulphate also removes heavy metals such as arsenic, chromium, selenium, lead and phosphate


Used in dyeing as a mordant

Used in pigments

Water Treatment

In water and wastewater treatment operations

A sludge thickener

Conditioning and dewatering agent.

Coagulants or flocculants for water clarification

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