Registration Dossier
Registration Dossier
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EC number: 205-426-2 | CAS number: 140-66-9
Phototransformation in air
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in air
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- supporting study
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- other: Review paper > secondary literature
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Calculation: U.S. Environmental Protection Agency (US EPA). (2000a) EPISuite. Estimation Program Interface (EPI) Suite Version 3.12. Washington, DC.
- Conclusions:
- In view of the short half-life (6 hours), photo-oxidation may be an important degradation process for the removal of octylphenol and further alkylphenols and possibly for lower alkylphenol ethoxylates from the atmosphere.
- Executive summary:
Atmospheric photo-oxidation rates 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. 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 and further alkylphenols and possibly for lower alkylphenol ethoxylates from the atmosphere.
Reference
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.
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