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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
phototransformation in water
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: No data available to assess the validity of the results according to the criteria established in the corresponding guideline.

Data source

Reference
Reference Type:
publication
Title:
A convenient test method for photochemical transformation of pollutants in the aquatic environment
Author:
Svenson A and Björndal H
Year:
1988
Bibliographic source:
Chemosphere, Vol. 17, No. 12, pp. 2397-2405

Materials and methods

Study type:
direct photolysis
Principles of method if other than guideline:
A test method, based on a modified Xenotest 1200, is described, and has been proved to be convenient for determination of the rate of photolytical degradation and by that it can make a valuable contribution to the evaluation of environmental stability of organic compounds. The test method was applied to testing of photochemical degradation of organic chemicals in aquatic media. Solutions of 9,10-anthraquinone were illuminated with filtered light, simulating daylight at controlled conditions. Quantum yields of photochemical degradation and half lifetimes (of conversion) were calculated using a sun spectrum at 60 ° N.
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Anthraquinone
EC Number:
201-549-0
EC Name:
Anthraquinone
Cas Number:
84-65-1
Molecular formula:
C14H8O2
IUPAC Name:
9,10-dihydroanthracene-9,10-dione

Study design

Radiolabelling:
no
Analytical method:
gas chromatography
Buffers:
The medium contained 99% ethanol and 1% 25 mM sodium phosphate, pH 7.
Light source:
Xenon lamp
Light spectrum: wavelength in nm:
295 - 500

Results and discussion

Quantum yield (for direct photolysis):
0.004
Details on results:
HALF-LIFE
Anthraquinone was studied in ethanol/water and the degradation corresponded to a half lifetime of 2.8 hours.

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Conclusions:
Anthraquinone was studied in ethanol/water and the degradation corresponded to a half lifetime of 2.8 hours.
Executive summary:

A test method, based on a modified Xenotest 1200, is described, and has been proved to be convenient for determination of the rate of photolytical degradation and by that it can make a valuable contribution to the evaluation of environmental stability of organic compounds. The test method was applied to testing of photochemical degradation of organic chemicals in aquatic media. Solutions of 9,10-anthraquinone were illuminated with filtered light, simulating daylight at controlled conditions. Quantum yields of photochemical degradation and half lifetimes (of conversion) were calculated using a sun spectrum at 60 ° N. Anthraquinone was studied in ethanol/water and the degradation corresponded to a half lifetime of 2.8 hours.