Molecular formula: molecular weight of NH4F: 37.04 
 Usage: can be used as a chemical reagent, glass etchant (hydrofluoric acid to participate in and use), fermentation industrial disinfectants and preservatives, the solvent of the metal beryllium beryllium oxide system and the steel plate surface treatment agent also used in the manufacture of ceramics, magnesium alloy, boiler feed water systems and steam cleaning off dirt and oil field gravel acid treatment is also used as alkylation, isomerization catalyst component. 
 Properties: white crystal or powder. Boiling point of 64.6 ° C, easily deliquescence, soluble in water, slightly soluble in alcohol, and will break down when heated in hot water. Can corrode glass, toxic. 
 CAS # :12125-01-8 
 Product specifications export grade industrial grade 
 Executive Standard GB / T 1276-1999 GB / T 1276-1999 
 Appearance white crystalline powder White crystalline or powder 
 Content% ≥ 98.0 ≥ 95.0 
 Sulfate (SO42-)% ≤ 0.01 ≤ 0.02 
 Chloride (Cl)% ≤ 0.005 ≤ 0.01 
 Free acid (to NH4HF2)% ≤ 0.5 ≤ 1.0 
 The fluorosilicates (SiF62-)% ≤ 0.3 ≤ 0.6 
 Iron (Fe)% ≤ 0.002 ≤ 0.004 
 Heavy metals (as Pb)% ≤ 0.001 ≤ 0.002 
 Residue on ignition (sulphates)% ≤ 0.02 ≤ 0.05 
 Loss on drying% ≤ 0.5 ≤ 1.0 
 Foreign matter determination ≤ 1mm/10 only ≤ 1mm/10 only