Formic acid is a naturally occurring organic compound found in the bodies of ants and other insects. It is also found in some plants, such as stinging nettles. The primary sources of formic acid are ants, which produce it as a defense mechanism against predators. Other sources include certain plant species, such as stinging nettles, and some bacteria. Formic acid has a wide range of uses, including as a preservative, a disinfectant, and an insecticide.