Registration Dossier
Registration Dossier
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EC number: 939-682-8 | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Readily biodegradable: 95.6% (CO2 evolution) in 28 days (OECD 301B)
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
As no study is available for assessing the biodegradability of the substance, in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5 Grouping of substances, a read-across to structurally related Alkyl Dimethyl Betaines is applied. The read across is justified due to the structural similarity of the analogue substances and similar physico-chemical properties resulting in a similar environmental fate and ecotoxicity profile. Please refer to the attached read-across justification document attached to section 13 in IUCLID for detailed information on the read-across performed.
Two GLP guideline studies investigating the ready biodegradability of CAS 683-10-13 (EOC Surfactants, 2008) and CAS 68424-94-2 (EOC Surfactants, 2008) are available. The biodegradation of these substances was tested in a CO2 evolution test according to OECD guideline 301B using domestic activated sludge as inoculum. The degradation rates of the test items were 95.6% for CAS 683-10-13 and 77.8% for CAS 68424-94-2 within 28 days (after acidification) and passed the 10-day window criterion. Thus, the test items are considered to be readily biodegradable. EC 931-700-2 was also tested in a CO2 evolution test according to OECD guideline 301B and GLP and shows biodegradation rates between 63 to 79% after 28 days (Clariant, 2004), also fulfilling the criterion of the 10-day window. Further test results from Garcia (2007), Huntsmann (1978, 1979), and Clariant (1994) as well as a EU Ring test (2000) approve the above mentioned results.
In summary, all these results demonstrate that the substance EC 939-682-8 is readily biodegradable.
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