titanium dioxide fiber grade 1. High quality and competitive price 2 ... 105°C after 23°C,24h)≤0.5%Water Soluble Matter≤0.5%PH of aqueous suspension6.0-8. ... Characters of tio2 rutile: White powder, Insoluble in water, Soluble in hot and concentrated strong acid and strong base, Chemical ... used in paint, ink, paper, plastic, rubber, artificial fiber, welding, ceramics, electronics, building materials, etc