Registration Dossier
Registration Dossier
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EC number: 616-466-9 | CAS number: 77501-63-4
Phototransformation in water
Administrative data
Link to relevant study record(s)
Description of key information
The half-life of (2-ethoxy-1-methyl-2-oxoethyl)-5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoate was 66 h in sterile aquatic solution in sunlight at 41 ° latitude.
Key value for chemical safety assessment
- Half-life in water:
- 66 h
Additional information
14C-labelled (2-ethoxy-1-methyl-2-oxoethyl)-5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoate dissolved in water or in 10% v/v acetonitrile in water, was rapidly degraded (half-life 3.5 h) by artificial sunlight (mercury lamp emissions filtered through borosilicate glass). CO2 and a mixture of three unidentifiable, polar photoproducts, each up to 5 % of initial 14C activity, were generated indicating ultimate degradation of the test substance. 2 of the substances were strongly absorbed to the inner glass reactor surface. The half-life of (2-ethoxy-1-methyl-2-oxoethyl)-5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoate was 66 h in sterile aquatic solution in sunlight at 41 ° latitude.
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