Registration Dossier
Registration Dossier
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EC number: 275-019-2 | CAS number: 70913-98-3
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Not readily biodegradable: 7.6% (CO2 evolution) in 28 days (OECD 301B).
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
Since no studies investigating the ready biodegradability of Fatty acids, tall oil, esters with dipentaerythritol (CAS 70913-98-3) are available for this endpoint, in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5 a read across to a structurally related substance Fatty acids, C16-18 and C18-unsatd., hexaesters with dipentaerythritol (CAS 68604-38-6) was conducted. The read-across substance is characterized by the same alcohol component (dipentaerythritol) hexa-esterified with a similar fatty acid profile (C16, C18, C18 unsatd.) and can therefore be used for read-across. The biodegradability of Fatty acids, C16-18 and C18-unsatd., hexaesters with dipentaerythritol (CAS 68604-38-6) was tested in a GLP guideline study following the specifications given by OECD guideline 301 B (Caduff, 2012). The study was carried out under aerobic conditions using domestic activated sludge as inoculum. During the incubation time of 28 days the CO2 production was measured. A degradation rate of 7.6% was assessed at test termination. Thus, a relevant biodegradation of the substance was not determined under the test conditions. However, inhibitory effects of the test substance on activated sludge microorganisms were not observed in the toxicity control of the study indicating that the test substance is not toxic to microorganisms in activated sludge. The read-across substance is therefore regarded as not readily biodegradable.
Based on this result from a structurally related read-across substance (in accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5) Fatty acids, tall oil, esters with dipentaerythritol (CAS 70913-98-3) is also considered as not readily biodegradable.
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