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Sodium fluorosilicate
  • Sodium fluorosilicate

Sodium fluorosilicate

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Sodium fluorosilicate

Molecular Formula: Na2SiF6

Molecular Weight: 188.06

CAS No.:16893-85-9

U.N-NO 2674

Class 6.1 H.S-NO 2826.2000

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°C. It is noxious!

Packing:Net each in 25kg plastic woven bag, lined with PE bag.

Usage: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 drinking water. It is used to produce insecticide in pesticide industry and sodium fluoride in man-made cryolite.


Sodium fluorosilicate

(based on dry)

99.0%min 98.5%min 97.0%min
Iron(Fe) 0.02%max 0.03%max 0.035%max
Free acid(based on HCI) 0.1%max 0.15%max 0.05%max
Water-insoluble matter 0.40%max 0.50%max 1.00%max
Loss on Drying at 105°C 0.3%max 0.4%max 0.6%max
Fineness(through 250μm test bolter) 90%min 90%min 90%min
Heave metal(based on Pb) 0.02%max 0.05%max 0.055max
Information is up-to-date: 07.03.2018

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