Formic acid, also known as methanoic acid, is the simplest carboxylic acid with the chemical formula HCOOH or CH2O2. It is a colorless liquid with a pungent odor and is miscible with water and most organic solvents. Formic acid occurs naturally in ants and has various industrial applications, including as a preservative and in the production of leather, textiles, and pharmaceuticals. It is also used as a coagulant in the production of rubber and in some cleaning products.