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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Phototransformation in water

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Administrative data

Endpoint:
phototransformation in water
Type of information:
experimental study
Adequacy of study:
supporting study

Data source

Referenceopen allclose all

Reference Type:
review article or handbook
Title:
Unnamed
Year:
2009
Report date:
2009
Reference Type:
secondary source
Title:
Unnamed
Year:
1992

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: UBA Test Guideline "Phototransformation of chemicals in water, part A, Direct Phototransformation"
Deviations:
yes
Remarks:
Method data are not available as the report details are unpublished.
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Warfarin
EC Number:
201-377-6
EC Name:
Warfarin
Cas Number:
81-81-2
Molecular formula:
C19H16O4
IUPAC Name:
4-hydroxy-3-(3-oxo-1-phenylbutyl)-2H-chromen-2-one

Results and discussion

Quantum yield (for direct photolysis):
0
Dissipation half-life of parent compound
DT50:
>= 54 d
Test condition:
No significant degradation (<10%) after 14 days of continuous irradiation at 313 nm (20-25°C). Lower limit, DT50 ≥ 54 days in surface water calculated using the Batelle-UBA computer program using central European environmental conditions during November.

Applicant's summary and conclusion