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EC number: 261-645-3 | CAS number: 59185-95-4
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Biodegradation (28 d) = 30 -40 %
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
The biodegradation potential of the substance was evaluated by taking in consideration data obtained from a study on Similar substance 01 due to the absence of available data on the substance. Justification for Read Across is given in Section 13 of IUCLID.
The biodegradation potential of the substance was evaluated under aerobic conditions in the manometric respirometry test according to the OECD Guideline 301 F, EU Method C.4 -D and ISO Standard 9408. The domestic activated sludge was exposed to the substance (at 50 mg/l) for 28 days. Biodegradation of the testsubstance was shown to be a comparatively slow process. Therefore the test duration was prolonged. After a test period of 74 days biodegradation processes were still ongoing. At 74 d, triplicate results ranged 40-50 %. The oxygen used for the biodegradation of the test substance (biochemical oxygen demand, BOD) is continuously produced and measured by the test apparatus. The measured BOD is compared with the calculated theoretical oxygen demand (ThOD) of the test substance and indicated as biodegradation %.
Biodegradation (28 days): 30 -40 % (BOD/ THOD)
Biodegradation (74 days): 40 -50 % (BOD/ THOD)
The test substance is not readily biodegradable.
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