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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Phototransformation in air

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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.