The Synthesis and Chromatographic Purification of Radioactive Allethrin

Abstract
Dl-cis-trans-C14-Allethrin (dl-rallethrolone ester of dl-cis, trans-2-C14 -chrysanthemumic acid) was prepared from 2-C14 -glycine and purified by passage through a silicic acid column. The radioactive allethrin appeared to be 98% pure and had a specific activity of 4278 c/m/mg and an LD50 against house flies of 0.2 [mu]g per fly.