Hematite

Hematite (CAS 1317-60-8, EC 215-275-4) is a naturally occurring iron ore mineral composed primarily of ferric oxide, Fe2O3. It is commercially identified under the E-code E 172 and known by trade and common names including Hem, Miox, Oligist, and Oligiste.

In building and construction, hematite serves as a pigment and weighting agent in cement and concrete formulations, where its iron oxide content provides density and colour stability. In the pulp and paper industry, it functions as a corrosion inhibitor by forming a passive iron oxide layer on metal process equipment, reducing oxidative degradation of contact surfaces.

Hematite is supplied in solid piece form and is subject to REACH registration requirements for industrial supply within the EU. The E 172 designation applies to food-contact and cosmetic applications, where specific purity criteria must be met. Packaging formats and available grades vary by supplier; buyers should confirm specification sheets prior to procurement.