Ammonium bifluoride

Synonyms

Acid ammonium fluoride; Ammonium acid fluoride; Ammonium bifluoride; Ammonium difluoride; Ammonium fluoride ((NH4)(HF2)); Ammonium fluoride comp. with hydrogen fluoride (1:1); Ammonium hydrofluoride; Ammonium hydrogen bifluoride; Ammonium hydrogen difluoride; Ammonium hydrogen fluoride; Fluorure acide d'ammonium [French]; [ChemIDplus] UN1727 (Solid); UN2817 (Solution)

Category

Fluorides, Inorganic

Description

White crystals, soluble in water; [CAMEO] Hygroscopic; Available as flakes, granules, and solutions; Impurities at <1% include hydrogen fluoride and ammonium fluoride; [CHEMINFO]

Sources/Uses

Used in chemical analyses, electroplating, and disinfecting food processing equipment; [CAMEO]

Comments

Produces weak hydrofluoric acid when dissolved in water; Corrosive; [CAMEO] Decomposes when heated above 240 deg C forming toxic and corrosive hydrogen fluoride gas; [CHEMINFO] Repeated, heavy exposures could cause fluorosis. [NJ-HSFS] See "FLUORIDES."

Biomedical References

2.5 mg/m3, as F

2.5 mg/m3, as F

1 mg/m3, as F, inhalable fraction

Explanatory Notes

mp = 258 deg F;[CHEMINFO] ERG guide is for both solid ammonium bifluoride and solutions.

Skin burns

Processes

Industrial Processes with risk of exposure:

• Electroplating
• Glass Manufacturing
• Using Disinfectants or Biocides

Activities

Activities with risk of exposure:

• Enameling
• Glassblowing