What are the environmental risks associated with fipronil (FIP) and imidacloprid (IMID) used in pet ectoparasiticides?

Label:chem

Topic
Fipronil (FIP) and imidacloprid (IMID) are widely used ectoparasiticides for controlling parasites in pets. Their environmental impact is often overlooked due to assumptions of limited use in pets compared to livestock. However, the growing pet population and evolving treatment practices may increase their environmental presence.
Answer
A study found that FIP and IMID persist in water for at least 60 days, with concentrations of 0.50 μg L⁻¹ for FIP and 0.18 μg L⁻¹ for IMID in wastewater samples. These concentrations are significantly higher than those reported in freshwater environments, indicating a potential risk to aquatic ecosystems.
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