Analytical Reagent Ammonium Bifluoride Glass Etching White Crystal Powder

Analytical Reagent Ammonium Bifluoride Glass Etching White Crystal Powder

Ammonium hydrogenfluoride is a compound formed from ammonium fluoride and hydrogenfluoride, with hydrogen fluoride molecules occupying spaces in thecammonium fluoride crystal lattice. It is the major constituent inglass-etching fluid (though sometimes replaced by potassium hydrogenfluoride), etching occurring due to the fluorination of silicon:SiO2 (s) + 4[NH4][HF2] (aq) → SiF4 (l) + 4[NH4]F (aq) + 2H2O (l)The structure of [NH4][HF2]contains tetrahedral [NH4]+ cations and linear [HF2] anions. Eachcation is surrounded by four fluorine atroms in a tetrahedron, withhydrogen - fluorine hydrogen bonds present between the hydrogen atomsof the ammonium ion and the fluorine atoms.

SPECIFICATION OF AMMONIUM BIFLUORIDE

1) FORMULA :- NH4HF2
2) MOL.WT :- 57.00
3) DESCRIPTION :- WHITE CRYSTAL POWDER
4) ASSAY :- 99.00% Min
5) FLUORINE AS F :- 66.6% Min
6) ACIDITY (AS HF) :- 35% Min
7) Loss on drying :- 1.6% Max
8) Ammonium fluoro silicate :- 0.8% Max
9) Water content :- 0.03% Max
10) Ignition residue content :- 0.10 % Max
11) SIO2 Content :-0.06% Max
12) CHLORIDE AS CL :- 0.003% Max
13) SULPHATE AS SO4 :- 0.002% Max

Package:

Package can be 25kg/50kg/1000kg laminating plastic woven bags, or according to special requirement.

PS: Content index and the fineness of grain size can be customized according to customer demand.