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Environmental fate & pathways

Phototransformation in air

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Description of key information

The overall OH rate constant of TAEE due to photochemical oxidation reaction is 1.06E-11 cm3/mol.sec.

Key value for chemical safety assessment

Half-life in air:
1.51 d

Additional information

In the troposphere TAEE is photochemically oxidised by hydroxyl radicals abstracting H atoms. The degradation half-life of TAEE in the air is calculated to be 1.01 days depending on environmental conditions (predominantly OH-radical concentration)(AOPWIN™ v1.92; U.S. EPA 2008a). The calculation is reliable, validated and falls within the applicability domain of the QSAR. Using a degradation rate constant of 1.06E-11 cm3/molecule.sec and an OH-radical concentration of 5E05 radicals/cm3 a half-life of 1.51 days is calculated. This half-life for degradation in air will be used in further assessment.