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-mass spectrometry (LC-MS) methods to ensure accurate detection and calibration. Essential for monitoring disinfection byproducts in drinking water, especially in studies related to chlorination processes. Also utilized in research settings to assess metabolic effects and toxicity, as dichloroacetic acid is a byproduct of water treatment and can accumulate in biological systems. The standard solution provides a known concentration for quality control, method validation, and compliance with regulatory testing protocols.