Lithium formate monohydrate is an inorganic salt with the chemical formula HCOOLi·H₂O. It appears as a white crystalline powder and is soluble in water. It is a source of lithium ions and formate anions. Its primary industrial application is in the field of energy storage, specifically as a precursor for the synthesis of lithium salts used in lithium-ion battery electrolytes. It serves as a starting material for producing high-purity lithium compounds critical for battery performance. Additionally, it finds use in laboratory settings as a reagent in organic synthesis, for example, in decarboxylation reactions or as a mild reducing agent. Lithium formate monohydrate is also utilized in some specialized areas such as nuclear magnetic resonance (NMR) spectroscopy and as a component in certain drilling fluid formulations. It is generally considered stable under recommended storage conditions.