Iron(II) oxide

Iron(II) oxide, commonly referred to as FeO and listed under C.I. 77489, is an inorganic iron salt also known by the trade names Glassite and Glossite. It carries CAS number 1345-25-1 and EC number 215-721-8. No E-code designation applies to this compound.

In metallurgical processing, FeO forms as an intermediate during iron ore smelting, where it participates in reduction reactions that convert ore to metalite iron. In the pulp and paper industry, it functions as a pigment and process chemical, contributing to colour development and chemical conditioning within specific treatment stages.

Iron(II) oxide is supplied as a coarse solid at 5 Mesh and is subject to REACH registration requirements for European supply chains. Procurement teams should confirm grade specifications and purity documentation directly with the supplier, as available grades vary by intended application.