ortho- ethylethylphosphonothioate

ortho- ethyl(O- 2, 4, 5 - trichlorophenyl)ethylphosphonothioate

[¦ȯr·thō ¦eth·əl ¦ō ¦tü ¦fȯr ¦fiv ¦trī‚klȯr·ō¦fen·əl¦eth·əl‚fäs¦fan·ō′thī·ə‚wāt] (organic chemistry) C10H12OPSCI2 An amber liquid with a boiling point of 108°C at 0.01 mmHg; solubility in water is 50 parts per million; used as an insecticide for vegetable crops and soil pests on meadows. Also known as trichloronate.