Used primarily in environmental and analytical chemistry, this solution serves as a reference standard for the detection and quantification of o,p′-DDE, a metabolite of DDT, in various samples. It is crucial in monitoring pesticide residues in soil, water, and food products to assess environmental contamination and ensure regulatory compliance. Additionally, it aids in research studies focused on the persistence and impact of organochlorine compounds in ecosystems and human health. Laboratories rely on it for calibrating instruments and validating analytical methods to achieve accurate and reliable results.