Used in forensic and clinical toxicology to detect the presence of ethanol in biological samples such as blood or urine. The solution reacts with ethanol to form chloral hydrate, which produces a visible change, often a precipitate or color shift, indicating a positive result. It is particularly useful in rapid screening for alcohol intoxication in emergency settings or law enforcement. Also employed in qualitative analysis in laboratories to confirm ethanol in suspected samples. Due to its sensitivity to alcohol content, it plays a role in post-mortem toxicology and industrial safety testing.