Registration Dossier
Registration Dossier
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EC number: 616-466-9 | CAS number: 77501-63-4
Phototransformation in soil
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 estimated to be 32 h, with CO2 being the predominat degradation product
Key value for chemical safety assessment
- Half-life in soil:
- 32 h
Additional information
In the laboratory in artificial sunlight, (2-Ethoxy-1-methyl-2-oxoethyl)-5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoate was predominantly degraded to carbon dioxide but also two products similar to those observed in soil metabolism studies. The substances were identified by TLC, GC/MS and other methods to be 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoyl-lactic acid and 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acid. The half-life of the (2-Ethoxy-1-methyl-2-oxoethyl)-5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoate was estimated to be 32 h as determined from the 14C activity suggesting that the trifluoromethyl-group carrying ring is degraded slightly faster than the other aromatic ring.
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