has role gas molecular entity hydrogen chloride A mononuclear parent hydride consisting of covalently bonded hydrogen and chlorine atoms. Chlorwasserstoff HCl Hydrochloride Hydrogen chloride Hydrogenchlorid Wasserstoffchlorid [HCl] chlorane chloridohydrogen chlorure d'hydrogene cloruro de hidrogeno hydrochloric acid hydrogen chloride chloride hydrogen halide chlorine molecular entity mononuclear parent hydride chloronium mouse metabolite