Here's what rhymes with persulfate.

Consider these alternatives

xanthate / state dichromate / cognate cyanate / late manganate / late ferricyanide / side dithionite / might permanganate / late molybdate / state uranyl / will hypochlorite / right bisulfite / sulfide thiocyanate / late guanidine / seen diacetate / state etomidate / state hydroxylamine / mean benzophenone / acetophenone ammonium / chromium thiosulfate / sulfate