Aquatic Thermal and Photochemical Reactivity of N-(1,3-Dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD), N-Isopropyl-N′-phenyl-p-phenylenediamine (IPPD), and 6PPD-quinone

does not play a significant role for any of the compounds. Reaction rate constants are reported as well as 6PPD-Q molar yields from 6PPD, which were minimal for all aqueous pathways examined. 6PPD-Q may have a longer environmental lifetime as there are fewer degradation pathways. This research will help us to better understand and control these chemicals in the environment.