H3NBF3

H3NBF3, also known as ammonium trifluoroborate, is a chemical compound with the formula NH4BF4. It is an ionic compound consisting of the ammonium cation (NH4+) and the trifluoroborate anion (BF3-). This salt is typically a white crystalline solid.

Ammonium trifluoroborate is soluble in water and can decompose upon heating to release ammonia, hydrogen fluoride, and boron trifluoride. It is a relatively stable compound under normal conditions. Its preparation often involves the reaction of ammonia or ammonium hydroxide with fluoroboric acid.

In industrial applications, H3NBF3 has been used as a flux in metallurgy, particularly in the soldering and brazing of metals like aluminum and magnesium. It helps to remove oxides from the metal surface, allowing for better wetting and adhesion of the solder or braze material. It has also found use in some etching processes and as a component in certain chemical syntheses. Due to the presence of fluoride, handling and disposal require caution as it can release hazardous substances.