Purity: 99.0% [O] <0.6%  free [Si] <0.2% APS: 40nm SSA: 80 m2/g True density: 3.22 g/cm3 Bulk density: 0.08 g/cm3 Crystal cell: Cubic Color: Green CAS No.: 409-21-2 EINECS Number: 206-992-8 Form: Powder Solubility in / Miscibility with Water: Insoluble Hazard class: No Shelf time: 24 months General properties & features: It has high purity, small particle diameters, large specific surface area, high surface activity, low loose loading density, excellent mechanic, thermal, electrical and chemical properties, e.g., it has high hardness and melting point, high wear resistance and fine self- lubricating, anti-creep, anti-oxidization, different radiation or adsorption of light, low thermal expansive coefficient and large high temperature strength. It can be used as microwave susceptor, semiconductor, IR radiation materials and so on.