2014-02-11 by seoer8Chemical formula TiO2. Molecular weight 79.90. titanium dioxide rutile amorphous powder, become yellow when heated, the high temperature to brown, then white and cold. Insoluble in water. Chemically quite stable, insoluble in hydrochloric acid, nitric acid and dilute sulfuric acid. Was dissolved in hot concentrated sulfuric acid, hydrofluoric acid. Amphoteric oxide is weak, and potassium hydrogen sulfate melt generation titanium sulfate; generated with molten sodium hydroxide sodium titanate. Used as white pigment and glaze porcelain, also used for making titanium, titanium alloy, carbide. Rubber, paper used as filler. Motor industry for manufacturing insulators, porcelain and so on. Decomposition of ilmenite with sulfuric acid industry, iron and then by hydrolysis.