1-Chloro-9,10-bis(phenylethynyl)anthracene is a fluorescent dye used in lightsticks. It emits yellow-green light, used in 30-minute high-intensity Cyalume sticks. See also 9,10-Bis(phenylethynyl)anthracene 2-Chloro-9,10-bis(phenylethynyl)anthracene References Fluorescent dyes Organic semiconductors Anthracenes Alkyne derivatives Chloroarenes