Formula: K2SiF6, MW: 220.26 
 Uses: wood preservatives. Manufacture of potassium glass, optical glass and opaque glass, used as insecticides, pesticides and also used in ceramics, synthetic mica. 
 Properties: white crystal or powder, odorless, tasteless, slightly acidic. Hexagonal crystal relative density of 3.08. 
 CAS # :16871-90-2 
 Product specifications export grade industrial grade 
 Implementation of standards Yotech Standard Yotech Standard 
 Content% ≥ 99.0 ≥ 98.0 
 Free acid (H2SiF6)% ≤ 0.1 ≤ 0.5 
 Sulfate (SO42-)% ≤ 0.01 ≤ 0.02 
 Chloride (Cl)% ≤ 0.05 ≤ 0.1 
 Heavy metals (as Pb)% ≤ 0.005 ≤ 0.01 
 Water insoluble% ≤ 0.1 ≤ 0.5 
 In the control test 
 Loss on drying% ≤ 0.2 ≤ 0.5 
 Whiteness% 85-90 ≥ 85 
 Transmittance (15% aqueous solution)% ≥ 85 ≥ 80 
 Mesh 100% through 80 mesh 80 mesh 90%