Registration Dossier

Environmental fate & pathways

Phototransformation in air

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
phototransformation in air
Type of information:
(Q)SAR
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
results derived from a (Q)SAR model, with limited documentation / justification
Justification for type of information:
QSAR prediction: migrated from IUCLID 5.6
Qualifier:
no guideline followed
Principles of method if other than guideline:
Predicted photooxidation half-lives for phthalate esters based on hydroxyl radical attack were obtained from structure activity relationships contained in the Atmospheric Oxidation Program (AOP), reference: Meylan, W. M., P. H. Howard. 1993. Computer Estimation of the Atmospheric Gas Phase Reaction Rate of Organic Compounds with Hydroxyl Radicals and Ozone. Chemosphere. 26:2293-2299.
GLP compliance:
not specified
Estimation method (if used):
Predicted photooxidation half-lives for phthalate esters based on hydroxyl radical attack were obtained from structure activity relationships contained in the Atmospheric Oxidation Program (AOP).
Light source:
sunlight
Light spectrum: wavelength in nm:
>= 290 - <= 400
Duration:
28 d
Parameter:
not applicable
Key result
DT50:
>= 0.04 - <= 0.4 d
Test condition:
Atmospheric Photooxidation Half-Life (years)
Reaction with:
other: Reported half-lives are specified as a range to indicate differences that are expected due to varying hydroxyl radical concentrations between pristine (3x10 "~ radicals cm 3) and polluted (3xI0 6 radicals cm -3) air.
Transformation products:
not measured
Validity criteria fulfilled:
not specified
Conclusions:
Diallyl Phthalate atmospheric photo-oxidation half-life was found to be between 0.04 and 0.4 days.

Description of key information

Prediction of key value based on a QSAR model included in the Atmospheric Oxidation Program (AOP), reference: Meylan, W. M., P. H. Howard. 1993. Computer Estimation of the Atmospheric Gas Phase Reaction Rate of Organic Compounds with Hydroxyl Radicals and Ozone. Chemosphere. 26:2293-2299.

Key value for chemical safety assessment

Half-life in air:
0.4 d

Additional information

Diallyl Phthalate atmospheric photooxidation half-life was found to be comprised between 0.04 and 0.4 days. Reported half-lives are specified as a range to indicate differences that are expected due to varying hydroxyl radical concentrations between pristine (3x10 2 radicals cm 3) and polluted (3x10 6 radicals cm -3) air.