Molecular formula: KHF2 molecular weight: 78.11 
 Usage: chemical reagent, for the manufacture of ceramics and magnesium alloy, etc.; electrolyte used for the manufacture of anhydrous hydrogen fluoride, hydrogen fluoride pure potassium, elements fluorine production is also used in the manufacture of optical glass, painted glass corrosion, can also be used as the welding of silver products cosolvent, wood preservatives, masking agents and catalyst for the alkylation of benzene. 
 Properties: white or colorless, transparent tetragonal system crystalline, slightly sour smell in the air, easy to dissolve slightly soluble in alcohol, easily soluble in cold water, decomposed in the hot water, the aqueous solution is strongly acidic, higher sublimation temperature, can corrode glass, ammonium hydrogen fluoride, toxic, corrosive to the skin and stored in plastic containers should be sealed. Proportion: 2.37g/mL, (25 ° C), melting point: 239 ℃. 
 CAS # :7789-29-9 
 Product specifications exports of industrial-grade class reagent grade (AR) 
 Implementation of standards Yotech Standard Yotech Standard Shanghai Q/HG22-509-85 
 Content% ≥ 98.0 ≥ 99.0 ≥ 99.5 
 Free acid% 24.5-26 24.5-26 24.5-26 
 Chloride (Cl)% ≤ 0.05 ≤ 0.01 ≤ 0.005 
 Sulfate (SO4)% ≤ 0.05 ≤ 0.02 ≤ 0.005 
 Fluorosilicates (K2SiF6 dollars)% ≤ 0.3 ≤ 0.10 ≤ 0.02 
 Heavy metals (as Pb)% ≤ 0.005 ≤ 0.003 ≤ 0.002 
 Packing density (20 mesh) kg / L 0.86-0.92 0.88-0.92 0.86-0.92 
 Solubility g do not dissolve in absolute alcohol is not soluble in absolute alcohol is not soluble in absolute alcohol 
 Nickel (Ni)% ≤ 0.001 ≤ 0.001 ≤ 0.0002 
 Iron (Fe)% ≤ 0.005 ≤ 0.003 ≤ 0.0005 
 PH (5% solution) 2.5-2.7 2.5-2.7 2.5-2.7 
 In the control test 
 White crystal White crystal White crystal appearance identification 
 Loss on drying (105 ° C / 2H)% ≤ 0.5 ≤ 0.2 ≤ 0.1 
 Whiteness% ≥ 80 ≥ 85 ≥ 85 
 Transmittance (15% aqueous solution)% ≥ 95 ≥ 99 ≥ 99 
 Foreign matter determination ≤ 1mm/10 ≤ 1mm/10 only only ≤ 1mm/10 only.