4-Chloromercuribenzenesulfonate. Chloromercuribenzene-p-sulphonic Acid . Chloromercuribenzenesulfonate . PCMPS . p-Chloromercuriphenylsulphonate . 4 Chloromercuribenzenesulfonate . Acid, Chloromercuribenzene-p-sulphonic . Chloromercuribenzene p sulphonic Acid . p Chloromercuriphenylsulphonate . PCMBS . Chloromercuriphenylsulfonate . A cytotoxic sulfhydryl reagent that inhibits several subcellular metabolic systems and is used as a tool in cellular physiology. . 0.68