Ferric sulfate is also called iron (III) sulfate or ferric salts. It is often used to agglomerate and control several forms of industrial waste. It has many different applications and typically appears as either a grayish-white powder or a yellow crystalline solid.

Ferric sulfate is produced on a large scale through the reaction of sulfuric acid, an oxidizing agent such as hydrogen peroxide or nitric acid, and a hot solution of ferrous sulfate. It is corrosive to copper, copper alloys, galvanized steel, and mild steel. Reports of toxicity from ferric sulfate ingestion are rare, giving this chemical a low toxicity rating. Still, keep it away from children in all cases and avoid any form of ingestion.

  • Synonyms: Ferric Persulfate, Ferric Sesquisulfate, Ferric Sulfate Liquid, Iron (III) Sulfate
  • INCI: Ferric Sulfate
  • Chemical formula: Fe2(SO4)3
  • CAS #: 10028-22-5
  • Hazard: 8, Corrosive Liquid


Use the links below to view all package sizes for these specific products:

Ferric Sulfate 50%
Ferric Sulfate 60%
Ferric Sulfate 60% NSF


AppearanceReddish brown liquid
SolubilitiesSoluble in water, poorly soluble in organic solvents such as acetone, ethanol or various acetates. It is insoluble in sulfuric acid
Density3.1 g/cm³
Boiling point0°F
Freezing point-90°F
Molecular weight399.88 g/mol
Weight per gallon12.0887 lbs
ClassInorganic salt
GradesNSF, Technical
water treatment plant

Uses and applications for ferric sulfate

Ferric sulfate is favored to deal with industrial waste because it can handle several functions. When it comes to water treatment, ferric sulfate solutions can perform several crucial functions.

Water Treatment: In water and wastewater treatment, it acts as a coagulant, controls odor to minimize hydrogen sulfide release, and aids phosphorous removal. Sludge thickening, water purification, conditioning, and dewatering often involve ferric sulfate. Soil conditioner and mordant in the dyeing process are other common applications. Pigments and pickling baths for steel and aluminum use ferric sulfate as well. Both potable and wastewater clarification requires color removal, phosphate removal, turbidity removal, and heavy metal removal. Sludge conditioning and lime softening applications all use ferric sulfate.

Quick Answers

Ferric(III) sulfate, is the chemical compound with the formula Fe₂(SO₄)₃. Usually yellow, it is a salt and soluble in water. A variety of hydrates are also known. Solutions are used in dyeing as a mordant, and as a coagulant for industrial wastes.

Ferric sulfate can be extremely hazardous to the environment and efforts should always be made to limit its exposure. Therefore, it is important when you are trying to find out where to buy ferric sulfate to consider which distributor has the expertise and caution to handle it with the precision it requires.

If you are looking for a high-quality ferric sulfate distributor who can get the chemical to your facility quickly and cost-efficiently, look no further than Brenntag North America.

Your best approach will be to contact Brenntag North America. Brenntag is the established global market leader in ingredient and chemical distribution and can fully supply all your acetic acid and other chemical needs.

Ferric sulfate is available in bags, drums, totes, and bulk tank trucks. You can view all ferric sulfate products and package sizes on Brenntag Connect.

You can download a copy of the SDS for ferric sulfate from Brenntag Connect. Download the SDS now.

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