Benzalkonium Chloride (BZK, BKC, BAK, BAC), also known as alkyldimethylbenzylammonium chloride, is an anti-bacterial/antimicrobial ingredient. It is a type of cationic surfactant, and an organic salt. Benzalkonium chloride works well in hand sanitizer and hand wash formulations, and can even be used as a surfactant and preservative
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