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EC number: 214-787-5 | CAS number: 1194-65-6
Table 1: Degradation rates of the test substance in the 'Goorven' water/sediment test system
1hockey stick model: before hinge point, after hinge point, overall
2based on 1st order multi-compartment model, and normalised data/1st order
*coefficient of determination
Table 2: Degradation rates of the test material in the 'Engelse Dijk' water/sediment test system
Table 3: Summary of the quantitation of [14C]-dichlobenil and metabolites in water, sediment and polyurethane foam (PUF) for the Goovern system (% of applied)
BAM = 2,6-dichlorobenzamide
others = includes residual (post-extraction) radioactivity in the water layer and up to four individual metabolites all ≤0.61% of applied
Table 3: Summary of the quantitation of [14C]-dichlobenil and metabolites in water, sediment and polyurethane foam (PUF) for the Englese Dijk system (% of applied)
2 -CBA = 2-chlorobenzoic acid
In a GLP compliant water/sediment study conducted in line with standardised guideline OECD 308, the degradation of the test material in two water/sediment systems was determined. The test material was incubated in the laboratory in two non-contaminated water/sediment systems at 20 ± 2 ºC for 100 days. The initial test material concentration in the water layer was approximately 2.7 mg/L. Replicate samples of each water/sediment system were taken at 0, 3, 7, 15, 30, 59 and 100 days. The test material in the water phase is removed through volatilisation (major process) and degradation.
The dissipation half-life of the test material in the aqueous phase ranges from 10.1 - 10.9 days, based on first order kinetics and 3.5 - 6.3 days, based on the hockystick model.
Metabolites in the water layer were 2,6-dichlorobenzamide, 2-chlorobenzoic acid (only in one of two test systems) and eight unidentified minor metabolites, none of which exceeded 10 % of applied radioactivity or 5 % of applied radioactivity at two consecutive time points.
The half-life of the test material was determined to be 10.1-10.9 days (first order kinetics) or 3.5-6.3 days (hockystick model) according to a study performed in line with OECD Guideline 308.
See 'Environmental Fate and Pathways' endpoint summary.
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