The chemical formula H3 N2O5 represents Nitric acid. It is a highly corrosive, toxic, and strong mineral acid. It is composed of hydrogen, nitrogen, and oxygen atoms. Nitric acid is a colorless liquid that fumes in moist air and has a pungent, choking odor. It is one of the most important industrial chemicals and is used in the production of fertilizers, explosives, dyes, plastics, and other chemicals.