Registration Dossier
Registration Dossier
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EC number: 251-646-7 | CAS number: 33703-08-1
Phototransformation in air
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in air
- Type of information:
- (Q)SAR
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
- Justification for type of information:
- Calculation based on AOPWIN v1.92, Estimation Programs Interface Suite™ for Microsoft® Windows v 4.10. US EPA, United States Environmental Protection Agency, Washington, DC, USA. For details see explanation given in " Any other information of materials and methods".
- Principles of method if other than guideline:
- Calculation based on AOPWIN v1.92, Estimation Programs Interface Suite™ for Microsoft® Windows v 4.10. US EPA, United States Environmental Protection Agency, Washington, DC, USA.
- GLP compliance:
- no
- Estimation method (if used):
- PHOTOCHEMICAL REACTION WITH OH RADICALS
- Concentration of OH radicals: 0.5E+06 radicals/cm3
- Degradation rate constant: 26.8034 E-12 cm3/molecule-sec
- Temperature for which rate constant was calculated: 25 °C
- Computer programme: AOPWIN v1.92 - Key result
- DT50:
- 14.4 h
- Test condition:
- calculation based on a 24 h day
- Validity criteria fulfilled:
- yes
Reference
For detailed description on the model and its applicability, see "Any other information on materials and methods incl. tables". The estimation is based on a 24 hour day.
Description of key information
After evaporation or exposure to the air, diisononyl adipate will be rapidly degraded by photochemical processes.
Key value for chemical safety assessment
Additional information
No experimental studies investigating the phototransformation of Diisononyl adipate (DINA, CAS 33703-08-1) in air is available. QSAR calculations using AOPWIN v1.92 indicate, that DINA is susceptile to indirect photodegradation in air. The estimated half time for the reaction with OH-radicals is calculated to be 14.4 h (24h day; OH-concentration: 0.5E+06 OH/cm3). However, photodegradation is not considered to be an important environmental fate process since the substance is not expected to evaporate into the atmosphere due to the low vapor pressure of 0.000000002 hPa at 20 °C.
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