"character:Non-toxic CAS NO£º13463-67-7 Properties£ºWhite solid or powder Melting point:1830¡«1850℃ £¬Boiling point:2500~3000℃, Refractive index£º2.76 2.55, density£º3.9~4.2 3.8~4.1¡£ tanium dioxide solubilityis is very small in water , but can be dissolved in acid and alkali-soluble."