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Environmental fate & pathways

Phototransformation in air

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Reference
Endpoint:
phototransformation in air
Type of information:
(Q)SAR
Adequacy of study:
key study
Study period:
Not applicable
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
Qualifier:
no guideline followed
Principles of method if other than guideline:
The gas-phase oxidation rate and half-life was calculated using the atmospheric oxidation program AOPwin, contained in the EPA's estimation program interface suite.
GLP compliance:
no
Key result
DT50:
2.155 h
Test condition:
Based upon a hydroxyl radical concentration of 1.5 x 10^6 molecules/cubic cm (12 hour day), a half-life of 2.155 hours was calculated.

The gas-phase oxidation rate of the test substance in the troposphere was predicted to be 59.5637 x 10-12 cm3/molecule-sec. Based upon a hydroxyl radical concentration of 1.5 x 106 molecules/cubic cm (12 hour day), a half-life of 2.155 hours was calculated.

Validity criteria fulfilled:
yes
Conclusions:
Under the conditions of the test, the gas-phase oxidation rate of the test material in the troposphere was calculated to be 59.5637 x 10E-12 cubic cm/molecule-sec. A half-life of 2.155 hours was calculated.
Executive summary:

Under the conditions of the test, the gas-phase oxidation rate of the test material in the troposphere was calculated to be 59.5637 x 10-12 cubic cm/molecule-sec. A half-life of 2.155 hours was calculated.

Description of key information

Half-life of 2.155 hours; estimated using AOPWIN; Schocken (2002)

Key value for chemical safety assessment

Half-life in air:
2.155 h

Additional information

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