The following 2 entries include the term persulfate.

ammonium persulfate


: a colorless crystalline salt (NH4)2S2O8 used as an oxidizing agent and for improving dense photographic negatives

potassium persulfate


: a crystalline salt K2S2O8 used chiefly in oxidizing and bleaching and as a promoter of polymerizations (as in the manufacture of GR-S rubber)

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