Cyanide Detector (image) Indiana University Share Print E-Mail Caption A ball-and-stick model of the detector is shown at upper left. After cyanide (CN-) reacts with the colorless detector, the detector will emit visible light when illuminated with ultraviolet or "black" light. Credit Dongwhan Lee Usage Restrictions Users of this image must credit Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.