Registration Dossier
Registration Dossier
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EC number: 945-069-6 | CAS number: -
Endpoint summary
Administrative data
Description of key information
In a CO2 evolution test C9-11 branched alcohols, C10 rich diesters with nonanedioic acid attained 72% biodegradation after 28 days and satisfied the 10-Day window validation criterion, whereby 60% biodegradation must be attained within 10 days of the biodegradation exceeding 10%. The test item can therefore be considered to be readily biodegradable under the strict terms and conditions of OECD Guideline No. 301B (Roulstone 2014).
Bis(2-ethylhexyl) azelate reached biodegradation values of 89.3% (replicate 1) and 73.2% (replicate 2) after a test period of 28 days in a CO2 evolution test. Furthermore, degradation over 60% took place within the 10 d-window period. Therefore, this substance can be judged as readily biodegradable. In the toxicity control more than 25% degradation occurred within 14 days. Therefore, test substance is assumed to be not inhibitory towards sludge (Desmares 1998).
No hydrolysis study is considered necessary based on the fact that the substance is considered to be readily biodegradable.
The logKoc of for representative structures in the molecule and a structural analogue as calculated with a QSAR varies between 4.8 and 5.9.
Additional information
The data available are on structural analogues of the substance. In view of the similarity of these substances to Diesters of alcohols, C7-9-iso-, C8-rich, 2-ethylhexyl and nonanedioic acid and the similarity of the hydrolysis products, these data can be used to conclude that Diesters of alcohols, C7-9-iso-, C8-rich, 2-ethylhexyl and nonanedioic acid is readily biodegradable.
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