1,8-Dinitropyrene has been reported to be a photosensitizer; however,there is no evidence that it has ever been used commercially for this or any other purpose (IARC 1989). 1,8-Dinitropyrene is available for research purposes at a purity of at least 99% and in 14C- or 3H-labeled form at a radiochemical purity of at least 98%.