antibacterial substance that is a water-soluble powder used in antiseptic soaps and toothpaste
A polyhalogenated compound, 2,2'-methylenebis(3,4,6-trichlorophenol)-3,4,6-trichloro-2-[(2,3,5-trichloro-6-hydroxyphenyl)methyl]phenol, once used as a disinfectant