2-Chloro-9,10-bis(phenylethynyl)anthracene is a fluorescent dye used in lightsticks. It emits green light, used in 12-hour low-intensity Cyalume sticks.

See also 9,10-Bis(phenylethynyl)anthracene 1-Chloro-9,10-bis(phenylethynyl)anthracene

References