83318-76-7 AI3-29686 Caswell No. 528C EPA Pesticide Chemical Code 128846 LS 81.5877 Phosphonothioic acid, ethyl-, S-(1,1-dimethylethyl) O-ethyl ester S-(1,1-Dimethylethyl) O-ethyl ethylphosphonothioate S-(1,1-Dimethylethyl)-O-ethyl ethylphosphorothioate