Molecular formula: K2SiF6

Molecular Weight: 220.27    Implementation criteria: Enterprise standards

Physical and chemical properties:

White crystallization or powder, no bromine tasteless, six square crystalline crystallization, relative density 3.08; Hexagonal crystallization relative density 2.665 (℃), slightly acidic, absorbent, slightly soluble In water, soluble in hydrochloric acid, solubility increases slightly with the increase of temperature, insoluble in alcohol, hydrolyzed into potassium fluoride, hydrogen fluoride and silicic acid in hot water, decomposed into potassium fluoride when burning and Silicon tetrafluoride.

Product usage:

As a preservative in the wood industry; as an additive for magnesium and aluminum smelting in the metallurgical industry; used in the manufacture of potassium glass, optical glass, opaque glass in the glass industry; in the pesticide industry ；Used in the manufacture of pesticides; in the organic industry for the manufacture of intermediates; analytical reagents used in analytical chemistry; and in chemical production for the production of anticorrosive materials. Also used in ceramic  synthetic mica and so on.

Index name	Index Value	Index name	Index Value
Fluorosilicate K2SiF6%	≥99	Moisture（H2O）	≤0.5
Iron（Fe）%	≤0.005	Chloride(Cl）	≤0.1
Free acid（HF）	≤0.1	Phosphorus Pentoxide(Pb）	≤0.005
Heavy metal（Pb）%	≤0.01	Size（through80 mesh）	≥90
Sulfate（SO4?）	≤0.2	Water Insoluble Matter	≤0.5