Nomenclature
CAS number: 1341-49-7
Ammonium fluoride ((NH
4)(HF
2)); acid ammonium fluoride; ammonium hydrogen fluoride.
F
2H
5N; mol wt 57.04.
F 66.61%, H 8.84%, N 24.56%.
NH
4HF
2.
Description and references
Prepn from hydrofluoric acid and NH3: Hassel, Luzanski, Z. Kristallogr. A83, 449 (1932); Gmelins, Ammonium (8th ed.) 23, 148 (1936).
Properties
Orthorhombic crystals which readily etch glass.
d 1.5. mp 124.6°. Freely sol in water.
Keep in plastic, rubber, wood or paraffined
containers and well closed. See also Ammonium Fluoride.
Use
In manuf of Mg and Mg alloys; in brightening of
Al; for purifying and cleansing various parts of beer-dispensing apparatus,
tubes, etc., sterilizing dairy and other food equipment; in glass
and porcelain industries; as mordant for aluminum; as a “sour” in
laundering cloth. In lab production of HF.