Registration Dossier

Administrative data

Endpoint:
phototransformation in water
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1987
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The study was performed according to generally accepted scientific standards and was described in sufficient detail.

Data source

Reference
Reference Type:
publication
Title:
Sensitized Photooxidation of Phenols by Fulvic Acid and in Natural Water
Author:
Faust BC, Hoigne J
Year:
1987
Bibliographic source:
Environ. Sci. Technol., Vol. 21 (10), 957-964

Materials and methods

Study type:
indirect photolysis
Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Dissolved organic material was used as sensitizer for formation of singlet oxygen and organic peroxy radicals (transient oxidant).
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Analytical method:
high-performance liquid chromatography
Light source:
sunlight
Sensitiser (for indirect photolysis)
Type of sensitiser:
natural water
Details on sensitiser:
transient oxidants from dissolved orgnic material
Duration of test at given test condition
Duration:
4 h
Temp.:
20 °C
Initial conc. measured:
3.1 mg/L

Results and discussion

Dissipation half-life of parent compoundopen allclose all
DT50:
11 d
Test condition:
June sunlight, top meter in Greifensee, 20°C
DT50:
60 h
Test condition:
continuous sunlight, 1-m-depth average, 20°C
DT50:
24 h
Test condition:
continuous sunlight, surface, 20°C
Predicted environmental photolytic half-life:
11d in natural lake water

Any other information on results incl. tables

Photooxidation half-life, continuous sunlight:

- surface: 24 h

- 1-m depth average: 60 h

- top meter of Greifensee: 275 h

Applicant's summary and conclusion