Used as a reference standard in analytical laboratories for the quantification of dichloroacetic acid in environmental, biological, and water samples. Commonly employed in gas chromatography (GC) and liquid chromatography (LC) methods to calibrate instruments and validate test procedures. Ensures accurate detection and measurement of dichloroacetic acid, a disinfection byproduct in drinking water, supporting regulatory compliance and water quality monitoring. Also utilized in research studies related to metabolism and toxicology due to its role as a metabolic modulator.