硫りゅう化か水すい素そMeaningsNoun1. hydrogen sulphide; hydrogen sulfide; sulphuretted hydrogen; sulfuretted hydrogenKanji used硫sulphur化transformation水water素elementaryPitch accentりゅうかすいそComposed of硫りゅう化かsulfuration; sulphurationNoun水すい素そhydrogen (H)Noun