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Environmental fate & pathways

Phototransformation in air

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Description of key information

Melcer et al. (2007) conducted a literature review with regard to physical-chemical properties and environmental fate characteristics of alkylphenols and alkylphenol ethoxylates. 
The atmospheric photo-oxidation rate for octylphenol was calculated using EPISuite v3.12 (U.S. Environmental Protection Agency EPISuite. Estimation Program Interface (EPI) Suite Version 3.12. Washington, DC.) assuming a unique highly branched structure for the compound.

Key value for chemical safety assessment

Half-life in air:
6 h

Additional information

The authors found that the calculated vapour phase half-life for octylphenol was 6 hours.

In view of the short half-life, photo-oxidation may be an important degradation process for the removal of octylphenol from the atmosphere.