Used as a reference standard in analytical laboratories for the accurate identification and quantification of chloral hydrate in environmental, pharmaceutical, and forensic samples. Commonly employed in gas chromatography (GC) and liquid chromatography-mass spectrometry (LC-MS) methods to calibrate instruments and validate test procedures. Ensures reliability in monitoring chloral hydrate levels in drinking water, biological fluids, and drug formulations. Also supports regulatory compliance testing and quality control in water treatment and clinical diagnostics.