Registration Dossier
Registration Dossier
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EC number: 201-853-3 | CAS number: 88-72-2
Endpoint summary
Administrative data
Description of key information
Phototransformation in air
When released to the atmosphere, 2-nitrotoluene is expected to exist entirely in the vapour phase. The dominant removal mechanisms would be reaction with photochemically generated hydroxyl radicals (estimated half-life 8h) and direct photolysis.
Hydrolysis
Chemical hydrolysis and oxidation of 2-nitrotoluene are not expected to be important removal processes. If released to soil, 2-nitrotoluene may be resistant to oxidation and chemical hydrolysis.
Phototransformation in water
2-nitrotoluene may be susceptible to photolysis. Because nitroaromatic compounds absorb sunlight strongly in the ultraviolet and blue spectral region, they are generally susceptible to photochemical transformation in aquatic systems. For the direct photolysis of o-nitrotoluene in water (near the surface, at 40 degrees latitude, throughout the year) a quantum yield of 0.0022 and a corresponding half-life period of 18.9 h was found by Simmons and Zeep, 1986. Photolysis is accelerated by indirect degradation mechanisms (the effects of humic acids, nitrates, etc. in natural waters). This is especially true for o-nitrotoluene, for which the degradation rate in natural waters was increased by a factor of 6-7.
Additional information
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