benzalkonium chloride Alkyl dimethylbenzyl ammonium chloride, quaternium, geramine, BKC Purity from 45% up to 95%, C12-18 Benzalkonium Chloride Cas: 68391-01-5,8001-54-5, 139-07-1 Other names: Alkyl dimethylbenzyl ammonium chloride, quaternium, geramin, BKC, Purity from 45% up to 95%, C12-18 Disinfectant, fungicide, widely used in medicine and water treatment.