Ammonium hydrogen difluoride is an important raw material in laboratory chemistry and scientific laboratories. It is used in various applications, including BERAHA I, II, and III color etchant kits.

As a component of these kits, it aids in the etching and staining of metallic samples, allowing for effective visualization and analysis.

Chemically, ammonium hydrogen difluoride (NH4HF2) is a compound of ammonium (NH4+) and hydrogen difluoride (HF2-). It acts as a weak acid and is soluble in water.

Its chemical properties allow it to act as an etchant to clean or modify surfaces. The result of this application is a clean, highly visible surface that allows further investigation. For example, it can help make surface structures of metals visible, providing valuable insights for analysis and quality control.