ETRIMFOS

Описание

Etrimfos is a colorless liquid, mp ?3.35 ?C, vp 6.5 mPa (20 ?C). Solubility in water is 40 mg/L (23–24 ?C). It is miscible with most organic solvents. Log Kow > 3.3. Neat etrimfos is unstable and degrades ca. 40% in 28 d at 50 ?C, but the dilute solutions in nonpolar solvents and its formulations are stable (about 5% loss in 1 y at ca. 20 ?C). It is hydrolyzed in aqueous media; DT₅₀ (25 ?C) at pH 3, 6, and 9 are 0.4, 16, and 14 d, respectively.

Использование

Etrimfos is used to control chewing insects in top fruit, vines, olives and a number of other crops. It is also used to control stem borers in rice and insect and acarid pests of stored products.

Опасность

Toxic.

Метаболический путь

Etrimfos is principally degraded in soil and plants via dearylation of etrimfos itself or by hydrolysis of etrimfos oxon to the pyrimidinol (6-ethoxy-4-hydroxy-2-ethylpyrimidine), further metabolism of which involves de-ethylation to a dihydroxypyrimidine (2-ethyl-4,6-dihydroxypyrimidine). In mammals both hydrolysis and demethylation to desmethyl etrimfos are involved in detoxification. Additionally, the ethyl and ethoxy groups of the pyrimidinol hydrolysis product may be hydroxylated and conjugated. Etrimfos oxon is metabolically highly unstable and is often not detected.