Photodegradation of the phenylpyrazole insecticide ethiprole in aquatic environments and a comparison with fipronil.

ABSTRACT: Ethiprole (ETH) is a phenylpyrazole insecticide that is used worldwide as an alternative to fipronil (FIP). Research on the photodegradation of ETH in aquatic environments has been limited compared with that on FIP. In this study, to clarify the photodegradation of ETH in aquatic systems, the photodegradation pathway and products were investigated using liquid chromatography and liquid chromatography-tandem mass spectrometry. We also determined the photochemical half-lives (t_1/2) of ETH and its main degradation products. The primary photodegradation pathway was cyclization/dechlorination and hydroxylation/dechlorination of ETH to form the didechlorinated products (benzimidazole of des-chloro-hydroxy-ETH). Some newly identified photodegradation products and analogs of FIP photode

SUBMITTER: Hirashima S 

PROVIDER: S-EPMC11379744 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature