Registration Dossier

Diss Factsheets

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:
other information
Study period:
2002
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Accepted calculation method
Principles of method if other than guideline:
AopWin v1.90, integrated in U.S. EPA's EPI program Vers. 3.10
Estimation method (if used):
Atkinson R (1987). A structure-activity relationship for the estimation of rate constants for the gas-phase reactions of OH radicals with organic compounds. Int J. Chem. Kinet. 19, 799-828
Details on test conditions:
Sensitiser (for indirect photolysis): OH
Sensitiser concentration: 500000 molecule/cm³ (approximate 24-hour mean in cental Europe)
DT50:
4.5 h
Test condition:
Sensitiser (for indirect photolysis): OH; Sensitiser concentration: 500000 molecule/cm³
Transformation products:
not specified
Rate constant (for indirect photolysis): = 0.0000000000847 cm³/(molecule*sec)
Degradation in % (for indirect photolysis): = 50 after 4.5 hour(s)
Validity criteria fulfilled:
not applicable
Conclusions:
The QSAR calculated rate constant for the OH sensitized photodegradation of isophorone diamine is approximately 8.47E-11 cm3/(molecule * s) (AopWin Computer Program, Vers. 1.90, integrated in U.S. EPA's EPI program Vers. 3.10). At 500,000 OH radicals / cm3, this corresponds to a half-life of 4.5 hours.
Executive summary:

The QSAR calculated rate constant for the OH sensitized photodegradation of isophorone diamine is approximately 8.47E-11 cm3/(molecule * s) (AopWin Computer Program, Vers. 1.90, integrated in U.S. EPA's EPI program Vers. 3.10). At 500,000 OH radicals / cm3, this corresponds to a half-life of 4.5 hours.

Description of key information

The QSAR calculated rate constant for the OH sensitized photodegradation of isophorone diamine is approximately 8.47E-11 cm3/(molecule * s). At 500,000 OH radicals / cm3 (approximate 24-hour mean in central Europe), this corresponds to a half-life of 4.5 hours.

Key value for chemical safety assessment

Additional information