苯扎氯铵.doc

苯扎***铵běnzhālǜǎnBenzalkoniumChloride本品为***化二***苄基烃铵的混合物。按无水物计算,含烃铵盐(C22H40CIN)%~%。,%~%.【性状】本品为白色蜡状固体或黄色胶状体;水溶液显中性或弱碱性反应,振摇时产生多量泡沫。本品在水或乙醇中极易溶解,在***中微溶。Shapeandproperties:Thisproductisawhitewaxysolidoryellowjelly;watersolutionisneutralorweakalkalinereaction,whenshaking,,her.【鉴别】(1),加硫酸1ml使溶解,加***,置水浴上加热5分钟,放冷,,置水浴上温热5分钟,取上清液2ml,加5%亚***钠溶液1ml,置冰水中冷却,再加碱性β-萘酚试液3ml,即显猩红色。(2)取本品,,照分光光度法(附录ⅣA)测定,在257nm,262nm及269nm的波长处有最大吸收。(3)(3)取本品1%水溶液10ml,加稀***,即发生白色沉淀,滤过,沉淀能在乙醇中溶解,滤液显***化物的鉴别反应(附录Ⅲ)。Identification:(1),with1mlofsulfuricaciddissolving,,heatingonthewaterbathfor5minutes,,waterbathfor5minutes,takethesupernatant2ml,adding5%sodiumnitritesolution1ml,coolinginwater,addalkalinenaphtholsolution3ml,thenscarletwillshow.(2)Takethisproduct,,accordingtothespectrophotometricmethod(AppendixIVA),at257nm,262nmand269nmatthewavelengthofmaximumabsorption.(3)Takethisproduct1%aqueoussolution10ml,,thatis,whiteprecipitate,filtration,hanol,thereactionofchlorideinthefiltrate(AppendixIII).【检查】酸碱度:,加水50ml使溶解,加溴甲酚紫溶液(取溴甲酚紫50mg,