The polychlorinated
aromatic antimicrobials triclosan and
triclocarban are in widespread use for killing microorganisms indiscriminately,
rapidly, and by nonspecific action. While their utility in healthcare
settings is undisputed, benefits to users of antimicrobial personal
care products are few to none. Yet, these latter, high-volume uses
have caused widespread contamination of the environment, wildlife,
and human populations. This feature article presents a timeline of
scientific evidence and regulatory actions in the U.S. concerning
persistent polychlorinated biocides, showing a potential path forward
to judicious and sustainable uses of synthetic antimicrobials, including
the design of greener and safer next-generation alternatives.