〈912〉灭火剂(二氟二溴甲烷)是我国自己合成并投入生产的性能优良的气相灭火剂之一。近年来,发现其气体可以通过呼吸系统,引起雄性动物的抗生精作用,因此有可能被考虑作为男性避孕药来使用。为了保证在生产及使用上的安全,有必要对该药是否具有毒性这个问题,作出明确的答复,本工作就是为此目的而设计的。 <912> Extinguishing agent (difluorodibromomethane) is one of the excellent performance gas phase fire extinguishing agents synthesized and put into production in our country. In recent years, it has been found that its gas can pass through the respiratory system and cause anti-spermatogenesis in male animals and therefore may be considered as a male contraceptive. In order to ensure its safety in production and use, it is necessary to give a clear answer to the question of whether the drug is toxic or not. This work has been designed for this purpose.