Registration Dossier

Environmental fate & pathways

Phototransformation in air

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Description of key information

The phototransformation rate is in the range 12.59 -42.13 x 10-12cm3/molecule/sec.The calculated half-lives are in the range 0.254 -0.850 d (3.047 -10.195 hrs).

Key value for chemical safety assessment

Additional information

Hydrocarbons, C14-C20, aliphatics, <=2% aromatics are UVCB. Therefore, the phototransformation in air was estimated from the AOPWIN v1.92 calculations of phototransformation of selected hydrocarbons likely to be constituents of Hydrocarbons, C14-C20, aliphatics, <=2%aromatics. The single representative hydrocarbons were selected among all the classes and the whole carbon range of the category.

The phototransformation rate is in the range 12.59 -42.13 x 10-12cm3/molecule/sec.The calculated half-lives are in the range 0.254 -0.850 d (3.047 -10.195 hrs). These values are largely below the trigger limit (2 days). Therefore, Hydrocarbons, C14-C20, aliphatics, <=2% aromatics are not persistent.