论文部分内容阅读
敌百虫(Dipterex)分子式:C_4H_8O_4PCl_3 结构式: 化学名称:1-羟基-2,2,2-三氯乙基磷酸-0,0-二甲基酯分子量257.5粗制品为白色结晶体。含有小量油状杂质,具有氯醛特殊气味,由于油状杂质存在故略具吸潮性,精制品为白色结晶,熔点78～80℃,(工业品熔点70℃左右),沸点120℃(0.4mmHg);92℃(0.05mmHg)比重1.73,能溶于水可达13%～15%(25℃)在水中缓慢变化,遇硷或受高热迅速分解产生敌敌畏(DDVP),在石油溶剂如煤油,汽油中溶解度很低,在固体或熔融状态下相当稳定,在酸性溶液中较稳定,挥发性不大,其蒸气压在30℃时为4×10~(-5)mmHg。
Dipterex Molecular formula: C_4H_8O_4PCl_3 Structural formula: Chemical name: 1-hydroxy-2,2,2-trichloroethyl phosphate-0,0-dimethyl ester Molecular Weight 257.5 The crude product is a white crystal. Contains a small amount of oily impurities, with chloraldehyde special odor, due to the presence of oily impurities slightly hygroscopicity, the refined product is white crystal, the temperature 78 ~ 80 ℃, (industrial melting point of about 70 ℃), the boiling point of 120 ℃ (0.4mmHg ); 92 ℃ (0.05mmHg) Specific gravity 1.73, can dissolve in water up to 13% ~ 15% (25 ℃) Slow changes in water, in case of alkali or by the rapid heat decomposition of dichlorvos (DDVP), in petroleum solvents such as kerosene, Low solubility in gasoline, stable in solid or molten state, stable in acid solution, less volatile, the vapor pressure of 4 × 10 ~ (-5) mmHg at 30 ℃.