Synonyms: Tetrapotassium tetrahydrogen (hexane-1,6-diylbis(nitrilobis(methylene)))tetrakisphosphonate;Phosphonic acid, (1,6-hexanediylbis(nitrilobis(methylene)))tetrakis-, tetrapotassium salt;tetrapotassium N,N,N',N'-tetrakis(phosphonatomethyl)hexane-1,6-diamine