Used as a persistent metabolite in pest control, particularly in the management of resistant insect populations. Acts as a secondary active agent following the breakdown of fipronil in the environment or within target organisms. Effective against a range of insects including termites, fleas, and certain agricultural pests due to its prolonged residual activity. Commonly found in veterinary products for flea and tick control on pets, as well as in soil and non-food structural treatments. Its stability enhances long-term pest suppression but raises environmental concerns due to accumulation in ecosystems.