Registration Dossier
Registration Dossier
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EC number: 927-442-5 | CAS number: 15651-72-6
Phototransformation in water
Administrative data
- Endpoint:
- phototransformation in water
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- supporting study
Data source
Reference
- Reference Type:
- publication
- Title:
- No information
- Author:
- Svenson et al.
- Year:
- 1 989
- Bibliographic source:
- Chemosphere 18, 1805-1808
Materials and methods
Test material
- Reference substance name:
- Fe(III)EDTA
- IUPAC Name:
- Fe(III)EDTA
Constituent 1
Study design
- Light source:
- sunlight
Results and discussion
Dissipation half-life of parent compound
- DT50:
- 11 min
- Test condition:
- Top millimeters of a water body in Stockholm at noon in the beginning of summer (the yearly maximum spectrum)
- Details on results:
- Quantum yield estimated to <0.1 (pH 8-9)
Applicant's summary and conclusion
- Executive summary:
In a laboratory test with Fe(III)EDTA, the quantum yield was estimated to < 0.1 (pH 8-9). From this, a half-life of 11 minutes was calculated. This value refers to the top millimeters of a waterbody at noon in the beginning of summer (the yearly maximum spectrum). Because of factors like the daily periodicy of incident light, weather conditions like cloudiness, shadowing of surface and shore vegetation, adsorption and scattering by suspended solids, dissolved organic compounds and planctonic organisms, the real environmental half-life is certainly longer.
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