目的 全面研究有机硼类杀菌剂T 901A的毒性强度。方法 以昆明种小鼠为实验对象,采用经口灌胃染毒,连续观察14天不同剂量组小鼠死亡情况,用概率单位一对数图解法计算I,D。。及其可信限。 结果雄性小鼠LD_(50)为5.89 g/kg,95％可信限为5.54 g/kg～6.24 g/kg;雌性小鼠LD_(50)为6.31 g/kg,95％可信限为6.04 g/kg～6.58 g/kg。结论 根据消毒剂的分级标准规定,T 901A属实际无毒级杀菌剂。 Objective To comprehensively study the toxicity of organic boron fungicide T 901A. Methods Kunming mice were used as experimental subjects. Oral administration was used to observe the death of mice in different doses for 14 days. The I and D were calculated by one-to-one mapping with probability units. . And its credible limit. Results The LD50 of male mice was 5.89 g / kg and the 95% confidence limit was 5.54 g / kg ~ 6.24 g / kg. The female mice LD_ (50) was 6.31 g / kg and the 95% confidence limit was 6.04 g / kg ~ 6.58 g / kg. Conclusion According to the classification standard of disinfectant, T 901A is an actual non-toxic bactericide.