Used primarily as a persistent insecticide, especially in soil treatments to control termites and other underground pests. It is effective due to its stability and long residual activity in the environment. Historically applied in agriculture for crop protection, particularly in corn and cotton fields. Its use has declined significantly due to environmental persistence, bioaccumulation in the food chain, and toxicity to non-target species, leading to strict regulations or bans in many countries. Still monitored in environmental samples as an indicator of past pesticide use and contamination.