Potassium fluorosilicate K2SiF6

Potassium fluosilicateFormulaK2SiF6Molecular Weight220.27PropertiesIt is white crystals or powder, odorless, tasteless and weak acidic and have toxic. The density of hexagonal crystal is 3.08, and cubic crystal 2.665 (17).It is hygroscopic.It is slightly soluble in water, soluble in hydrochloric acid. Its solubility is slightly higher as the temperature gets higher. It is decomposed by heat to form potassium fluoride(KF) and silicon tetrafluoride(SiF4). It is hydrolyzed in hot water to form potassium fluoride(KF)hydrogen fluoride(HF) and silicate acid(H2SiO3).UsagesIt is used as wood preservationceramics mademetallurgy of aluminium and magnesium, and to manufacture optical glass as kalium glass. It is also used to prepare synthetic mica and antisepsis.Execute standardcorporation standardSpecificationItemDataPotassium fluosilicate(K2SiF6)≥ 98.5Iron(Fe)≤ 0.02Sulphate(SO42-)≤ 0.05Water(H2O)≤ 0.30Chloride(Cl)≤ 0.10Free acid(H2SiF6)≤ 0.10Heavy metal(Pb)≤ 0.01Phosphorus pentoxide(P2O5)≤ 0.01Fineness (80 μm)≥ 90Water-insoluble matter≤ 0.30Packing25 kg /50kg, packing with plastic bag lined woven sack.