Sodium Fluorosilicate

Alternate Text

Molecular formula: Na2SiF6

Molecular weight: 188.06

CAS No.: 16893-85-9

Property:It is colorless hexagonal, odorless and tasteless crystal with relative density 2.679. It is hygroscopic. It is soluble in ether, insoluble in alcohol. The solubility in acid is greater than in water. It decomposes in alkaline solution and produces sodium fluoride and silicon dioxide. It is decomposed to sodium fluoride and silicon tetrafluoride by heating to 300℃. It is noxious!


Sodium fluorosilicate is the largest variety of fluorosilicate in construction and building materials industry, mainly used as enamel aid solvent, glass emulsion. It is used as antiseptic in timber industry, hygroscopic agent of acid-resisting concrete, solidifying agent in natural latex products, additive in plating with zinc, nickel, iron and filler in plastic and fluorinating agent in pharmaceuticals and rinking water. It is used to produce insecticide in pesticide industry and sodium fluoride in man-made cryolite.

Packing:Net in 25KG plastic woven bag.




Sodium fluorosilicate

99.0% Min

Loss of weight on drying at 105℃

0.3% Max

Free acid (as HCI)

0.1% Max

Sulphate (SO42-)

0.25% Max

Iron (Fe)

0.02% Max

Water-insoluble matter

0.50% Max

Chloride (Cl-)

0.15% Max

Particle size through 250μm (60mesh) sieve

90% Min


Is a specialized manufacturing and operating chemical enterprise Our company own variety of export products which are widely used in chemical, pharmaceuticals, textile printing & dyeing, leather processing, fertilizer, water treatment, construction industry, food &feed additives and other areas. Oxalic acid, formic acid, sodium formate, calcium formate, sodium sulphide, series of humic acid, sodium hydrosulphide, ammonium chloride, sodium thiosulfate, and calcium nitrite are partial strong products. Among them, STPP occupy largest export volume and export to more than 20 countries and regions in America , Asia, Africa and other continents, winning customers praise with its superior quality , favorable price and excellent service. For over 10 years, stick to business philosophy of" you should give your customer what they really need not what you think they need ", Verdi has built long term & stable trade relationship with more than 45 countries and regions in the world. sincerely hope to cooperate with more clients in the world and seek common developments.