Registration Dossier
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EC number: 219-280-2 | CAS number: 2402-58-6
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Readily biodegradable but failing 14 d window: 67% (O2 consumption) in 28 days (ISO 10708, BODIS-test)
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable but failing 10-day window
Additional information
One study investigating the ready biodegradability of Didodecyl fumarate (CAS 2402-58-6) is available. The GLP study was conducted according to ISO guideline 10708 (BODIS test) under aerobic conditions using non-adapted activated sludge as inoculum (Börner, 1995). An initial test concentration of 100 mg/L (COD) was applied. Based on O2 consumption a mean degradation of 67% was observed after 28 days. The 14-day window was not passed. Hence, the substance is not readily biodegradable according to OECD criteria. Nevertheless, as the overall pass level of 60% O2 consumption for a BODIS test was passed within the 28 day exposure period, the substance is determined to be “readily biodegradable, but failing 10 window”.
Please consider: according to the “Guidance on information requirements and chemical safety assessment, Chapter R.16: Environmental Exposure” no differentiation between a 10 and 14 day window is made for the biodegradation assessment. This is reflected by a limited pick list for overall conclusion of biodegradation in IUCLID chapter 5.2.1 as well. However, as this test represents a modified OECD 301D test, a 14 day window would be acceptable. Due to the reasons given above, the substance will be assessed as readily biodegradable, but failing 10 window within this dossier.
In consequence of the rapid biodegradation, Didodecyl fumarate (CAS 2402-58-6) will not be persistent in the environment.
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