Sodium fluorosilicate Na2SiF6

Sodium fluorosilicate(Sodium silicofiuoride) Na2SiF6 FormulaNa2SiF6Molecular Weight188.06PropertiesIt 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!UsageIt 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.Execute standardZBG12017-89SpecificationItem DataExcellent gradeGrade IGrade IISodium fluorosilicate(based on dry)≥ 99.0≥ 98.5≥ 97.0Iron(Fe)≤0.02Free acid(based on HCI)≤ 0.10≤ 0.15≤ 0.20Heave metal(based on Pb)≤0.02≤0.05≤0.05Water-insoluble matter≤ 0.40≤ 0.50≤ 1.00Loss on Drying at 105≤0.30≤0.40≤0.60Fineness(through 250μm test bolter)≥90≥90≥90PackingIn 40Kg woven bag with plastic lining.Storage and transportationGB12268-90 poison article 61514(UN2674)