Registration Dossier
Registration Dossier
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EC number: 944-572-8 | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Not biodegradable: 0% biodegradation in 28 days test period (OECD 302C, read across)
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
Since no studies assessing the biodegradability of 5-[C11-12 (branched) alkyl]-2-hydroxybenzaldehyde oxime, in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5 Grouping of substances, a read-across to the structurally related source substance Benzaldehyde, 2-hydroxy-5-nonyl, oxime, branched (CAS 174333-80-3) was conducted. The read across justification document is attached to chapter 13.
The inherent biodegradation study with the source substance was performed according to GLP and OECD guideline 302C using non-adapted activated sludge as inoculum (Seyfried 2007). The biochemical oxygen demand (BOD) of the test substance in the test media was in the normal range found for the inoculum controls. Thus, the test substance was not biodegradable under the test conditions within 28 days.
In addition, several screening tests for Phenol, dodecyl-, branched (CAS 121158-58-5) are available in the respective REACH dossier published in the ECHA database (see table 2). In general, these tests show that Phenol, dodecyl-, branched is not readily biodegradable according to OECD criteria.
Table 2: Biodegradation test results for Phenol, dodecyl-, branched based on data from the respective REACh dossier.
Test |
Result |
Reliability |
Reference |
OECD 301B |
25% in 28 days (10 mg/L) 6% in 28 days (20 mg/L) |
4 (RL2 given in dossier) |
http://apps.echa.europa.eu/registered/data/dossiers/DISS-a0013377-90c2-2db6-e044-00144f67d031/AGGR-7c12bdcd-229a-49fc-a23b-257f5998259c_DISS-a0013377-90c2-2db6-e044-00144f67d031.html#AGGR-7c12bdcd-229a-49fc-a23b-257f5998259c |
OECD 302D |
10% in 56 days (adaption not specified) |
4 (RL1 given in dossier) |
http://apps.echa.europa.eu/registered/data/dossiers/DISS-a0013377-90c2-2db6-e044-00144f67d031/AGGR-37593b91-acf6-4a5d-acb1-c1debc584f8b_DISS-a0013377-90c2-2db6-e044-00144f67d031.html#AGGR-37593b91-acf6-4a5d-acb1-c1debc584f8b |
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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