[ Objective ] The main accident risk sources and risk factors of unsymmetrical dimethyl hydrazine( UDMH ) in stockpile and operation were analyzed, therefore control measures could be suggested to reduce occurrence of toxic accidents.

• [目的]对引起偏二甲肼作业人员急性、慢性中毒的基本原因进行分析,建立中毒风险故障树,提出防制措施。 [方法]用单因素分析方法,对偏二甲肼作业中可能导致人员中毒的环节进行分析,确定危险因素;