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Environmental fate & pathways

Phototransformation in air

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Description of key information

The estimated weighted average KOH and t1/2 of C12-14 ADBAC using AopWin v1.92 program (EPIWEB v 4.1) were found to be 4.17 x 10-11 cm3/molecule-sec and 0.26 days, respectively.

Key value for chemical safety assessment

Half-life in air:
0.26 d
Degradation rate constant with OH radicals:
0 cm³ molecule-1 s-1

Additional information

The hydroxyl radical constant (KOH) and reaction half-life (t1/2) of C12-14 ADBAC were estimated using the AopWin v1.92 program of EPIWEB v 4.1. KOH and t1/2values were calculated on a weighted-average basis using the mole fractions of the individual components. The calculated t1/2was based on a 12 hour daylight hydroxyl radical concentration of 1.5 x 106molecules (radicals) /cm3and a hydroxyl rate constant of 5.46 x 10-11cm3/molecule-sec. The weighted average estimated KOHand t1/2of the substance were found to be 4.17 x 10-11cm3/molecule-sec and 0.26 days, respectively (US EPA, 2012).