Registration Dossier
Registration Dossier
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EC number: 262-996-5 | CAS number: 61788-67-8
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
readily biodegradable
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
The biodegradability order is castor oil > fish oil > rape oil > mineral oil. In degradation kinetics studies (Luo et al 2010) the degradation rate constant (k) of sulphated castor oil, fish oil and rape oil are 0.87, 0.84, and 0.81 d-1, respectively. These degradation rate constants are slightly faster for the sulfited fatliquor substances where castor, fish and rape were 0.95, 0.93, and 0.85 d-1, respectively.). The higher content of unsaturated fatty acids and hydroxyl groups, the faster is the biodegradability of fatliquors.
A 1976 aerobic biodegradation study with the sodium salt of sulfated castor oil (CAS 68187-76-8) in an activated sludge inoculated system, documented DOC removal consistent with 96% biodegradation in 45 days. For this dossier, the sulfited fat liquors are used as a point of read across for the chemically similar sulfated fat liquors as there are more endpoint data for the sulfited fat liquors.
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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