Ferrous sulfate heptahydrate

An iron salt, produced as a natural by-product of the titanium dioxide (TiO2) manufacturing process, and subsequently used to produce animal feeds, cement, pigments, and in biogas and water treatment applications.


A rich source of iron for multiple markets

As a responsible, global chemical company, we are incredibly conscious of the resource issues facing our planet. That’s why we try to reuse and recycle as many of our raw materials and by-products as possible.

Ferrous sulfate heptahydrate, commonly known as copperas, is a green, water soluble, acidic salt, produced during the manufacture of TiO2. A cost efficient source of iron, we supply this secondary product to a variety of sectors, where it is put to good use in numerous chemical and industrial applications.

In the water treatment industry, ferrous sulfate heptahydrate can be used directly in water treatment plants to improve the coagulation and removal of elements such as phosphorus. In pigment production, copperas is a useful source of iron. Water-soluble and easy to handle, it is commonly used to produce red, yellow and black iron oxide pigments. Cement producers also use ferrous sulfate heptahydrate – harnessing its power to reduce chromium (VI) levels.

Our ferrous sulfate heptahydrate can also be dried and oxidized to create other useful forms of iron.

When dried, copperas turns into ferrous sulfate thermal monohydrate. With a high concentration of iron (around 30%) this by-product can be used as a valuable supplement in animal feeds. In its oxidized form, ferrous sulfate heptahydrate is a liquid source of iron that can be used in water treatment, biogas treatment and mining processes. This form of ferrous sulfate heptahydrate is marketed under our FERRICLAR™ range.