H2BO3F
H2BO3F is the chemical formula for fluoroboric acid, also known as tetrafluoroboric acid or fluoboric acid. It is a strong acid with the chemical formula HBF4. Despite the formula H2BO3F sometimes being written, it is not the correct representation of the molecule. Fluoroboric acid is a colorless, corrosive liquid that is highly soluble in water. It is produced by reacting boric acid with hydrofluoric acid. The compound is a strong acid due to the presence of the highly electronegative fluorine atoms, which stabilize the conjugate base, the tetrafluoroborate anion (BF4-). Fluoroboric acid is used in various industrial applications, including metal plating, etching, and as a catalyst in organic synthesis. It is also employed in the production of other boron compounds. Handling fluoroboric acid requires significant safety precautions due to its corrosive nature and potential to release toxic fumes.