Ammonium tetrafluoroborate (or ammonium fluoroborate) is an inorganic salt composed of the ammonium cation and the tetrafluoroborate anion, with the chemical formula NH4BF4. When heated to decomposition, ammonium tetrafluoroborate releases toxic fumes of hydrogen fluoride, nitrogen oxides, and ammonia.[4]

Preparation

Ammonium tetrafluoroborate can be prepared by reacting ammonium fluoride with boric and sulfuric acid:[5]

8 NH4F + 2 H3BO3 + 3 H2SO4 → 2 NH4BF4 + 3 (NH4)2SO4 + 6 H2O

References

  1. ^ "Ammonium Fluoroborate". American Elements. Retrieved 26 January 2021.
  2. ^ Gregory, K. Friestad; Branchaud, Bruce P. (15 April 2001). "Ammonium Tetrafluoroborate". Encyclopedia of Reagents for Organic Synthesis.
  3. ^ Lewis, R. J. (1999). Sax's Dangerous Properties of Industrial Materials. Vol. 1–3 (10 ed.). New York, NY: Van Nostrand Reinhold. p. 233.
  4. ^ Lewis, R. J. (1997). Sax's Dangerous Properties of Industrial Materials. Vol. 1–3 (9 ed.). New York, NY: Van Nostrand Reinhold. p. 209.
  5. ^ "Preparation of ammonium fluoroborate". Prepchem. Retrieved 26 January 2021.
Allikas: Https://en.wikipedia.org/wiki/Ammonium_tetrafluoroborate
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