Luminol

Luminol is a chemical compound used by forensic investigators to detect traces of blood at crime scenes. When luminol comes into contact with blood, it reacts with the iron in hemoglobin, causing a chemical reaction that emits a blue glow in the dark. This luminescence helps reveal small or hidden blood stains that are not visible to the naked eye, making it a valuable tool in crime scene analysis. The reaction is temporary, so the glow fades after a few minutes. Luminol is safe to handle when used properly and is widely employed in forensic science to uncover evidence.