Registration Dossier

Environmental fate & pathways

Phototransformation in air

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Description of key information

Decane half-life in air is 0.963 days. Therefore, decane is to be considered as not persistent in the atmospheric compartment (DT50 less than 2 days).

Undecane half-life in air is 0.854 days. Therefore, undecane is to be considered as not persistent in the atmospheric compartment (DT50 less than 2 days).

Dodecane half-life in air is 0.767 days. Therefore, dodecane is to be considered as not persistent in the atmospheric compartment (DT50 less than 2 days).

Tetradecane half-life in air is 0.648 days. Therefore, tetradecane is to be considered as not persistent in the atmospheric compartment (DT50 less than 2 days).

Key value for chemical safety assessment

Additional information

The phototransformation in air was estimated from the AOPWIN v1.92 calculations of phototransformation.

The phototransformation rate of decane is 11.11 x 10-12 cm3/molecule/sec. The calculated half-life is 0.963 d (11.552 hrs). This value is largely below the trigger limit (2 days). Therefore, decane is not persistent.

The phototransformation rate of undecane is 12.52 x 10-12 cm3/molecule/sec. The calculated half-life is 0.854 d (10.249 hrs). This value is largely below the trigger limit (2 days). Therefore, undecane is not persistent.

The phototransformation rate for dodecane is 13.94 x 10-12 cm3/molecule/sec. The calculated half-life is 0.767 d (9.210 hrs). This value is largely below the trigger limit (2 days). Therefore, dodecane is not persistent.

The phototransformation rate of tetradecane is 16.76 x 10-12 cm3/molecule/sec. The calculated half-life is 0.638 d (7.657 hrs). This value is largely below the trigger limit (2 days). Therefore, tetradecane is not persistent.