Hydrochloric acid is an inorganic chemical. It is a strong corrosive acid with a chemical formula HCl. It is also known as hydrogen chloride or muriatic acid. It is strongly acidic. It is colorless and viscous. It is corrosive and has a distinctively pungent smell. It is widely used as a laboratory reagent and in industry. It is used in the processing of leather, the production of gelatin. The physical properties such as density, melting point, PH, and boiling point depends on the molarity or concentration of HCl.