Registration Dossier
Registration Dossier
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EC number: 632-619-2 | CAS number: 881685-58-1
Endpoint summary
Administrative data
Description of key information
The substance is hydrolytically stable based on a OECD TG 111 and EPA 161-1 followed study. The half-life of the substance in the atmosphere by hydroxyl radical oxidation was estimated to be 2.29 hours (Atkinson method). Two direct photolysis studies (EPA 161-2, OECD draft guideline and JMAFF-12 Nohsan No 8147) with continuous irradiation (xenon arc; wavelengths > 290 nm and < 800 nm) at 25 ± 2˚C are available. One study shows that the DT50 of the substance was estimated to be in a range of 60 – 64 days of summer sunlight at latitudes of 30°N - 50°N at pH 7. The second study indicates that the DT50 of the substance was 26 days, which is equivalent to 82 - 84 days of summer sunlight at latitudes of 30°N - 50°N. In addition, the quantum yield of direct phototransformation in water was determined to be 1.01E-05 molecules degraded/photon. Two studies on photodegradation in soil (EPA 161-3 and OECD draft guideline) are available. The DT50 values were determined to be 68 – 72 days for 14C-pyrazole labelled substance and 65 – 68 days for 14C-phyenyl labelled substance of summer sunlight (calculated for latitudes of 30 - 50°N).
Additional information
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