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1-环己烯-1,2-二羧酸酐(Ⅰ)(又称Δ~1-四氢化酞酐),是一种新型的拟除虫菊酯杀虫剂氨菊酯的主要原料。它是由4-环己烯-1,2-二羧酸酐(Ⅱ)(又称Δ~4-四氢化酞酐)在五氧化二磷的存在下,200℃加热转化而成: 转化时间不同,转化率也不同。迄今未见分析测定方法,工厂生产仅以测定熔点来判断其转化率。从生产过程中发现,转化率对氨菊酯的质量及产量有很大影响,因而急待寻找一种简便而又可靠的定量分析方法。
1-cyclohexene-1,2-dicarboxylic anhydride (Ⅰ) (also known as Δ1-tetrahydrophthalic anhydride), is a new pyrethroid insecticide deltamethrin the main raw material. It is from 4-cyclohexene-1,2-dicarboxylic anhydride (Ⅱ) (also known as Δ 4-tetrahydrophthalic anhydride) in the presence of phosphorus pentoxide, 200 ℃ heating conversion: different conversion time , Conversion rate is also different. So far no analytical determination method, the factory production only to determine the melting point to determine the conversion rate. From the production process found that the conversion rate of the quality and yield of tetramethrin have a great impact, so an urgent need to find a simple and reliable quantitative analysis.