Iron Oxide

with excellent pigment performance, high tinctorial strength and covering power, equal tinctorial strength as massicot, good resistance to light and atmosphere and foul gas, a specific gravity of about 4, particle diameter 0.3-2 micron, good light-fastness and strong alkali resistance.

Soluble in hot strong acid, with high heat resistance, the loss of crystallization at temperatures above 150 ℃, resolve into red ferric oxide pigment.