Physicochemical property:

Property: White hexagonal crystals or powder, odorless, fine and smooth.
Melting point 1975℃
Relative density5.606
Refractive index 2.008~2.029
Solubility: Soluble in acid, sodium hydroxide, ammonium chloride, insoluble in water, ethanol and ammonia

Use: Mainly used as white pigments, rubber vulcanization active agents, reinforcing agents, organic synthetic catalyst, desulfurization agent for electrostatic copying, pharmaceutical