Cetylpyridinium chloride (CPC) is a cationic quaternary ammonium compound used in some types of mouthwashes, toothpastes, lozenges, throat sprays, breath sprays, and nasal sprays. It is an antiseptic that kills bacteria and other microorganisms. It has been shown to be effective in preventing dental plaque and reducing gingivitis. It has also been used as an ingredient in certain pesticides. Cetylpyridinium chloride may cause brown stains between the teeth and on the surface of teeth. However, these stains can be easily removed by a dental hygienist during a routine check-up.

外观与性状：白色粉末或晶体

熔点：77°C

稳定性：Stable. Combustible. Incompatible with strong oxidizing agents, strong bases.

储存条件：库房低温通风干燥

危险品运输编码： 2811

海关编码： 2933399090

危险类别： 6.1(b)

包装等级： III

生产方法
在48mlSOCl2和0.3gHCON(C
H3) 2的混合物中，搅拌下控制温度30-35℃，滴入81g十六醇。滴毕，混合物煮沸30min，冷却，蒸馏得138-140℃(压力270Pa)馏分，为氯代十六烷，收率92.2%。将80g氯代十六烷和32g干吡啶油浴加热到150-160℃，反应12-15h，反应毕，加入80ml干丙酮，混合物水浴加热溶解后再冷却得９94%收率的产品。熔点为87-88℃。

用途
消毒防腐药。