killing agent meaning in English

杀伤体
脱氧剂
镇静剂

Developing the foam - killing agent in paper - making
造纸消泡剂的研制
It is mainly used as chemical intermediate , can be used as insecticide , for example making pesticide toad killing agent ; it can also be used to prepare quaternary ammonium compound to change property and synthesize various kinds of processing accessory ingredients and additives
四、用途主要用于化学中间体，可作杀虫剂，如制造农药杀蟆丹；还可制备季胺化合物，作为改性合成各种处理助剂和添加剂。