nitrous acid (HNO2); a light-blue chemical solution often used as a reducing agent in industry

nitrate; any salt or ester of nitric acid

a chemical compound used as an explosive and as a medicine to treat chest pain by relaxing blood vessels

potassium nitrate; saltpeter; niter

nitrite; a chemical solid obtained by heating nitrate beyond its melting point or by melting it with metallic lead, commonly used in industrial chemistry and laboratories

sodium nitrate; niter