Formula: Na2SiF6  
M.W: 188.06
Properties: White crystals; no odour, no taste, with obsorbility and specific gravity 2.679; insoluble in ethanol, solubility in acid is bigger than in water; forms Fluoride and silica after dissolving in alkaline liquor; toxic.
Specification:(%)           
Na2SiF6          98% min 
Moisture          0.5% max 
Water-insoluble matter     0.5% max. 
Heavy metal (Pb)      0.05%max. 
Application: Milky agent and fusing agent for glass and enamel; preserving agent for wood; agricultural insecticide; hygroscopic agent for acid-resisting cement; coagulation accelerator in natural emulsion products. Additive in electroplating zinc , nickel and iron in three floors; stuffing agent in plastics; pharmacy, fluorating treatment for drinking water and for man-made crystals and Sodium Fluoride.
Packing: 25 Kg net, double plastic bags lined plastic woven bag.
Storage: Store at a ventilating, and dry place, keep away from food.
Hazardous details: UN No. : 2674; Class : 6.1; Packing group: Ⅲ