Registration Dossier
Registration Dossier
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EC number: 292-832-8 | CAS number: 91001-61-5
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Readily biodegradable: 79.5% (CO2 evolution) in 28 days (OECD 301B)
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
Three studies investigating the ready biodegradability of Fatty acids, C16-18 and C18-unsatd., mixed esters with adipic acid and trimethylolpropane (CAS No. 91001-61-5) are available. The key study was conducted according to OECD guideline 301B under aerobic conditions using non-adapted activated sludge as inoculum (Häner, 2006). Based on CO2 evolution a mean degradation of 79.5% was observed after 28 days. The 10-day-window was met. Hence, the substance is determined to be readily biodegradable according to OECD criteria.
This conclusion is supported by two additional guideline studies performed under aerobic conditions. One supporting study was conducted according to OECD guideline 301B using activated sludge as inoculum, which was obtained from a STP predominately treating domestic sewage (Oleon, 2003). Based on CO2 evolution a biodegradation of 60.9% was observed after 28 days. The other supporting study was conducted according to CEC L-33-T-82 using activated sludge as inoculum, which was obtained from a STP predominately treating domestic sewage (Falkenback & Nelis, 1991). Based on infrared spectroscopy a biodegradation of > 95% was observed after 21 days.
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