Iron oxide is the ferrous oxide and trioxide iron and magnetic ferrite of collectively. Ferrous oxide of traits : the black powder. Trioxide iron character : red brown powder for a low-level pigment, industry says most. The properties magnetic iron oxide red brown or black powder, it oxidation into ferroferric oxide in air.

Ferrous oxide of purpose: mainly used in glass of pigment. Trioxide iron of purpose:used to paint, ink, rubber industry, etc. Also available for catalyst and metal, glass and stones of polish. The USES magnetic iron oxide: it can make pigments and polishes, special magnetic ferrite can do tape and telecommunications equipment.