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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:
experimental study
Adequacy of study:
key study
Study period:
1988
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Principles of method if other than guideline:
Relative rate method, see Reference
GLP compliance:
not specified
Light source:
other: blacklight irradiation
Details on test conditions:
Sensitiser (for indirect photolysis): OH
Reference substance:
yes
Remarks:
Propene
Transformation products:
not measured

- Rate constant: (3.43 +- 0.06) x 1E-11 cm3/(molec. x s)

Rate constant (for indirect photolysis): ca. 0.0000000000343 cm³/(molecule*sec)
Degradation in % (for indirect photolysis): = 50  after 11.2 hour(s) at 500,000 OH radicals / cm3

Validity criteria fulfilled:
yes
Conclusions:
The rate constant for the OH sensitized photodegradation of 1,2,3,4-tetrahydronaphthalene was measured as (3.43 +- 0.06) x 1E-11 cm3/(molec. x s). At 500,000 OH radicals / cm3, this corresponds to a half-life of 11.2 hours.
Executive summary:

The rate constant for the OH sensitized photodegradation of 1,2,3,4-tetrahydronaphthalene was measured with a relative rate method as (3.43 +- 0.06) x 10E-11 cm3/(molec. x s). At 500,000 OH radicals / cm3, this corresponds to a half-life of 11.2 hours.

Description of key information

The rate constant for the OH sensitized photodegradation of 1,2,3,4-tetrahydronaphthalene was measured as (3.43 +- 0.06) x 1E-11 cm3/(molec. x s). At 500,000 OH radicals / cm3 (typical 24-hour mean in central Europe), this corresponds to a half-life of 11.2 hours.

Key value for chemical safety assessment

Half-life in air:
11.2 h
Degradation rate constant with OH radicals:
0 cm³ molecule-1 s-1

Additional information