Registration Dossier
Registration Dossier
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EC number: 500-394-9 | CAS number: 157707-87-4
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
ready biodegradability (Modified OECD Screening test conditions): 66.9% degradation after 28 days
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
Two reliable tests are available on the biodegradation of D-Glucopyranose, oligomers, branched and linear C9-11-alkyl glycosides (CAS 157707-87-4).
A non-GLP study based on the measurement of CO2 evolution has been assigned as key study (United States Testing Company, 1991). The study was carried out under Modified OECD Screening test conditions, incorporating the Gledhill CO2 evolution capture technique as found in PRO/BIO-D SFT/CO2 350-3. Activated sludge from a local sewage treatment plant was used as inoculum. After 28 days of exposure 66.9% degradation was measured. Hence, the substance is considered as readily biodegradable.
The second available study on biodegradation was conducted under GLP according to OECD guideline 306 (Opus Plus Ltd., 2005). The measurement was based on the oxygen demand of microorganisms from natural seawater. Under the stringent test conditions 46% degradation of the substance occurred within the 28 days test duration. The observed degradation under marine environmental conditions supports the result of the key study, whereas the measured degradation rate would not allow classifying the substance as ready biodegradable from this study only.
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