Zusammenfassung
Zur Voruntersuchung der Photostabilität des Insecticides Propoxur (2-Isopropoxyphenyl-N-methylcarbamat) im Freiland wurden Modellexperimente in organischen Lösungsmitteln durchgeführt. Der Photoabbau (λ>280 nm) von Propoxur verlief in Isopropanol deutlich schneller als in Cyclohexan oder Cyclohexen. Bei Bestrahlung in Isopropanol und Cyclohexan entstand als Hauptprodukt Isopropylphenylether, daneben Spuren von 2-Isopropoxyphenol. Dagegen erfolgte in Cyclohexen der Abbau hauptsächlich über eine Photomineralisierung.
Summary
In order to examine the photostability of the insecticide propoxur (2-isopropoxyphenyl-N-methylcarbamate) in the field model experiments with organic solvents were performed. Photodegradation (λ>280 nm) of propoxur was found to be more efficient in isopropanol solution than in the presence of cyclohexane or cyclohexene. Photolysis in isopropanol and cyclohexane mainly resulted in formation of isopropylphenyl ether. As a trace component 2-isopropoxyphenol was detected. In the presence of cyclohexene on the other hand photomineralisation was found to be the main degradation pathway.
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Dedicated to Professor Dr. H. Niebergall on the occasion of his 65th birthday
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Schwack, W., Kopf, G. Photodegradation of the carbamate insecticide propoxur. Z Lebensm Unters Forch 195, 250–253 (1992). https://doi.org/10.1007/BF01202804
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DOI: https://doi.org/10.1007/BF01202804