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Environmental fate & pathways

Phototransformation in air

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Administrative data

Endpoint:
phototransformation in air
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study cited in peer reviewed and generally accepted database.

Data source

Referenceopen allclose all

Reference Type:
secondary source
Title:
Kinetics and mechanisms of the gas-phase reactions of hydroxyl radical with organic compounds
Author:
Atkinson R
Year:
1989
Bibliographic source:
J Phys Chem Ref Data, Monograph 1: 135
Reference Type:
publication
Title:
A kinetics investigation of the gas-phase reactions of OH radicals with cyclic ketones and diones: mechanistlc insights.
Author:
Dagaut P et al.
Year:
1988
Bibliographic source:
J Phys Chem 92: 4375-4377.

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Measured, study was performed according to Wallington (1987). Wallington TJ, Kurylo MJ (1987). J Phys Chem, 91: 5050.
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Cyclohexanone
EC Number:
203-631-1
EC Name:
Cyclohexanone
Cas Number:
108-94-1
Molecular formula:
C6H10O
IUPAC Name:
Cyclohexanone

Study design

Details on test conditions:
Sensitiser (for indirect photolysis): OH
Sensitiser concentration: 0.5E6 molecule/cm³
Duration of test at given test condition
Temp.:
25 °C

Results and discussion

Dissipation half-life of parent compound
DT50:
2.5 d
Transformation products:
no

Any other information on results incl. tables

The rate constant by 25 °C = 6.39 (+/- 0.51)*10E-12 cm3/molecule*sec.

Rate constant (for indirect photolysis): = 0.00000000000639 cm³/(molecule*sec)
Degradation in % (for indirect photolysis): = 50 after 2.5 day(s)

Applicant's summary and conclusion