HCOO⁻, known as formate, is the conjugate base of formic acid. It consists of a single carbon atom bonded to two oxygen atoms and one hydrogen atom, with a negative charge on one of the oxygen atoms. Formate is commonly found in nature, particularly in the form of salts and esters. Formate plays a role in various biological processes and can be produced during the metabolism of certain compounds. It is also used in industrial applications, such as in the production of antifreeze and as a preservative in food. Additionally, formate is involved in the synthesis of other organic compounds.