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Degradation in air: OTNE is photodegradable in air. The rate constant for the gas phase reaction of OH radicals was estimated at 9.85*10-11cm3molecule-1s-1. Assuming a daylight period of 12 h and 2.0*106OH cm-3, the estimated atmospheric half-life is 1.4 hours. These data suggest that the atmospheric life time of OTNE is sufficiently short that it will not undergo long-range transport to any significant extent.

Degradation in water: A hydrolysis test for this substance is waived based on the absence of chemical groups that can undergo hydrolysis and on the rapid biodegradation of OTNE under natural conditions in river water.