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Sodium Fluorosilicate
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!
Usage: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.
Specification:


Item

Specification

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