申请人:Gutman Daniella
公开号:US20070010496A1
公开(公告)日:2007-01-11
The present invention provides a process for preparing a highly pure form of malathion having a reduced level of toxic impurities. In addition, the malathion prepared by the process of this invention is storage stable. The level of toxic impurities in the malathion, e.g., isomalathion, O,O,S-trimethyl phosphorodithioate (MeOOSPS), O,O,S-trimethyl phosphorothioate (MeOOSPO), O,S,S-trimethyl phosphorodithioate (MeOSSPO), malaoxon, isomalathion, diethyl fumarate, methyl malathion, dimethyl malathion, O,O-methyl,ethyl-S-(1,2-dicarboethoxy)ethyl-phosphorodithioate are lower than that of any other commercial preparation of malathion that may be used for pharmaceutical purposes.
本发明提供了一种制备高纯度马拉硫磷的工艺,其具有较低水平的有毒杂质。此外,通过本发明的工艺制备的马拉硫磷具有良好的储存稳定性。例如,马拉硫磷中的有毒杂质水平,如异马拉硫磷、O,O,S-三甲基磷二硫代酸酯(MeOOSPS)、O,O,S-三甲基磷硫代酸酯(MeOOSPO)、O,S,S-三甲基磷二硫代酸酯(MeOSSPO)、马拉氧酮、异马拉硫磷、富马酸二乙酯、甲基马拉硫磷、二甲基马拉硫磷、O,O-甲基、乙基-S-(1,2-二羧乙氧基)乙基磷二硫代酸酯均低于任何其他可能用于药用目的的商业马拉硫磷制剂。