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Environmental fate & pathways

Phototransformation in air

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Description of key information

The rate constant kOH of 2.61 * 10-12 cm3 molecule-1 s-1 was calculated. Using this estimate, a pseudo first order rate constant for degradation in air is calculated (using EUSES 2.0): Kdegair = 0.113 d-1. This rate gives a half-life of 6.3 days for PTBBA in air.

Key value for chemical safety assessment

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

Additional information