Ammonium formate is widely used in analytical chemistry as a mobile phase additive in liquid chromatography, particularly in mass spectrometry (LC-MS). It helps in the separation and detection of various compounds, improving ionization efficiency and reducing background noise. In organic synthesis, it serves as a reducing agent and a source of formic acid for hydrogenation reactions. It is also employed in the preparation of formamide derivatives and as a buffer in biochemical applications. Additionally, it finds use in the production of catalysts and as a corrosion inhibitor in industrial processes.