Technology Transfer

Dipotassium hexafluorosilicate

M.W.	220.0
Formula	K2SiF6

Specification:

Chemical Composition %
Item		K2SiF6 ≥	HF	Water Insolubles	H2O
			Maximum
Index	1st Grade	98	0.1	0.5	0.5
	2nd Grade	98	0.1	0.1	0.3

Properties:

White crystal or powder. Tasteless, slightly acidic. The specific gravity of hexagonal crystal system is 3.08, the specific gravity of hexagonal crystal system is 2.665(17℃). It is hygroscopic, slightly soluble in water, soluble in hydrochloric acid. The solubility increases slightly when temperature rises.

Applications:

It is used for wood preservation, ceramics and various optical glass manufacturing, aluminum and magnesium smelting. It can also be used as raw materials and anti-corrosion materials for synthetic mica.