Dufulin is an efficient antiviral agent for plants, however, data on its environmental fate, particularly concerning its transformation products (TPs), remain scarce. The TPs formed during abiotic degradation may pose significant environmental risks due to potential toxicity. Therefore, this study systematically investigated the hydrolysis and photolysis kinetics of Dufulin in aqueous solutions across various pH conditions. By employing HPLC-HRMS and