申请人:Gutman Daniella
公开号:US20090124823A1
公开(公告)日:2009-05-14
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方法,该方法降低了有毒杂质的含量。此外,本发明制备的马拉硫磷具有良好的储存稳定性。马拉硫磷中的有毒杂质含量,例如异马拉硫磷、O,O,S-三甲基磷二硫代酸酯(MeOOSPS)、O,O,S-三甲基磷酸酯(MeOOSPO)、O,S,S-三甲基磷二硫代酸酯(MeOSSPO)、马拉氧(malaoxon)、异马拉硫磷、己二酸二乙酯(diethyl fumarate)、甲基马拉硫磷(methyl malathion)、二甲基马拉硫磷(dimethyl malathion)、O,O-甲基、乙基-S-(1,2-二羧乙酸乙酯)磷二硫代酸酯的含量低于任何其他可用于制药目的的商业马拉硫磷制剂。