Registration Dossier
Registration Dossier
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EC number: 248-948-6 | CAS number: 28299-41-4
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
- Study period:
- 2010
- 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 limited documentation / justification
- Remarks:
- The estimation was performed with the AOPWIN programme (v1.91) which is implemented in EPIWEB 4.0. The calculation method in the programme is accepted.
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- Method followed AOPWIN (v1.91)
- GLP compliance:
- no
- Estimation method (if used):
- Photochemical reaction with OH radicals
Concentration of OH radicals: 0.5E+6 OH/cm³
Degradation rate constant: 25.9623E-12 cm³/molecule*sec
Duration of degradation: 24 hrs - Details on test conditions:
- Sensitiser (for direct photolysis): OH radicals
Sensitiser concentration: 5E5 molecules/cm³ - DT50:
- <= 0.62 d
- DT50:
- <= 14.8 h
- Test condition:
- 24-hr day
- Transformation products:
- not specified
- Validity criteria fulfilled:
- not applicable
- Remarks:
- estimation method
- Conclusions:
- The half-life for the photodegradation of the substance by reaction with hydroxyl radicals in air is estimated to be 0.62 days or 14.8 hours as estimated with AOPWIN (v1.91).
- Executive summary:
The photodegradation of the substance by reaction with hydroxyl radicals in air was with estimated with AOPWIN (v1.91). Based on a 24 hrs day and a concentration of 0.5E6 OH radicals/cm³, the overall rate constant was calculated to be 25.96E-12 cm³/molecule*sec and the half-life for photodegradation of the substance was 0.62 days or 14.8 hrs, respectively.
Reference
Description of key information
The half-life for the photodegradation of ditolyl ether by reaction with hydroxyl radicals in air is estimated to be 0.62 days or 14.8 hours as estimated with AOPWIN (v1.91).
Key value for chemical safety assessment
- Half-life in air:
- 14.8 h
- Degradation rate constant with OH radicals:
- 25.69 cm³ molecule-1 s-1
Additional information
The photodegradation of ditolyl ether by reaction with hydroxyl radicals in air was estimated with AOPWIN (v1.91). Based on a 24 hrs day and a concentration of 0.5E6 OH radicals/cm3, the overall rate constant was calculated to be 25.96E-12 cm3/molecule*sec and the half-life for photodegradation of ditolyl ether was 0.62 days or 14.8 hrs, respectively.
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