Registration Dossier
Registration Dossier
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EC number: 247-660-8 | CAS number: 26401-35-4
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
69 % biodegradation based on ThOD after 28 days (OECD 301F).
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
- Type of water:
- freshwater
Additional information
The test substance diisotridecyl adipate was demonstrated to be readily biodegradable in three OECD guideline 301-tests.
An OECD 301F-study (Flach, 2014, key study) (guideline suitable for poorly soluble and volatile substances) with the test substance has been conducted, showing that DITA is readily biodegradable (69 % biodegradation based on ThOD after 28 days). The inoculum used in this study was neither adapted, nor pre-exposed (confirmation of the test institute attached). Two more studies (OECD 301B) are available, showing that DITA is readily biodegradable. In the first OECD 301B study, 81 % biodegradation were achieved within 28 d, fulfilling the 10d-window criterion (although not required for an UVCB). A second OECD 301B-test resulted in a biodegradation extent of 69.6 % after 28 days. The other studies reported for DITA clearly indicate the ready biodegradability of the substance, by almost reaching the 60% biodegradation threshold. In the respective study according to OECD guideline 301B, a biodegradation of 56.6% within 28 days was obtained with DITA. Similar biodegradation was found in the other 301F study (58.53% biodegradation within 28 days). Supporting all these findings, the read-across substance diisotridecyl dodecanedioate was found readily biodegradable in an OECD 301B-test. All of the studies mentioned above are considered valid.
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