title: Phototransformation of clodinafop-propargyl.
abstract: Photodegradation of the herbicide clodinafop-propargyl was investigated on glass surface under sunlight and UV light. Four photoproducts were identified by NMR, IR, and MS. Major photolysis products were 2-[(5-chloro-3-fluoro-2-pyridyloxy) phenoxy] propanoic acid and prop-2-ynyl-2-[(5-chloro-3-hydroxy-2-pyridyloxy) phenoxy] propanoate, while minor were ethyl 2-[(5-chloro-3-fluoro-2-pyridyloxy) phenoxy] propanoate and 1-hydroxypropanyl-2-[(5-chloro-3-fluoro-2-pyridyloxy) phenoxy] propanoate. Rate of photodegradation followed first-order kinetics with significant correlation coefficient. The major photoproducts were observed in maximum quantity on the 7th and 10th day and further degraded within 15-20 days.
authors.affiliation: Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi, India.
authors.forename: Sugata
authors.initials: S
authors.lastname: Roy
authors.forename: Shashi B
authors.initials: SB
authors.lastname: Singh
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D004787:Environmental Pollution / Q000517:prevention & control; D006540:Herbicides / Q000737:chemistry*; D007700:Kinetics; D010777:Photochemistry / Q000379:methods*; D010782:Photolysis; D020005:Propanols / Q000737:chemistry*; D011422:Propionates / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D013472:Sunlight; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D000480:Alkynes; D006540:Herbicides; D020005:Propanols; D011422:Propionates; D011725:Pyridines; C028255:propargyl alcohol; C400760:clodinafop