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cetylpyridinium chloride

ce·tyl·py·ri·din·i·um chloride

noun \ˌsēt-^əl-ˌpī-rə-ˌdin-ē-əm-\

: a white powder consisting of a hydrated quaternary ammonium salt C₂₁H₃₈ClN·H₂O and used as a cationic detergent and antiseptic

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