Registration Dossier
Registration Dossier
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EC number: 482-110-2 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Biodegradation in water (2003)
Under the conditions of this study the active ingredient is considered not readily biodegradable.
Additional information
Biodegradation in water (2003)
The ready biodegradability of the active ingredient was investigated using a modified Sturm test, in accordance with the standardised guidelines OECD 301B, under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).
Fresh activated sludge, was used as the source of unacclimated microorganisms for the test. Biodegradability was determined by measuring the amount of carbon dioxide evolved from the chemical over the 28-day test period. The degradation is defined as the CO2 produced by the substance, as a percentage of the theoretical CO2 it could have produced, calculated from the carbon content of the test substance.
The test was performed at a nominal concentration of 53.1 mg/L whole test substance (33.8 mg active ingredient). The nominal carbon concentration of the replicate solutions was 20 mg/L. This concentration and an inoculum blank were established in duplicate and a single positive control, sodium benzoate at 34.3 mg/L, was also established at a dissolved organic carbon concentration of 20 mg/L. A single toxicity control, containing sodium benzoate at 34.3 mg/L and the test substance at 53.1 mg/L whole test substance, was also established at a combined dissolved organic carbon concentration of 40 mg/L.
After 28 days, the test substance at a nominal concentration of 20 mg/L dissolved organic carbon showed 0 % biodegradation. Under the conditions of this study the active ingredient is considered not readily biodegradable.
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