benzalkonium chloride

noun
benz·al·ko·ni·um chloride | \ˌben-zal-ˌkō-nē-əm- \

Medical Definition of benzalkonium chloride 

: a white or yellowish white mixture of chloride salts obtained as a bitter aromatic powder or gelatinous pieces that is used as an antiseptic and germicide — see zephiran

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