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EC number: 240-540-6 | CAS number: 16485-10-2
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The ready biodegradability of the test item was assessed over a 28 day period. The test material attained 94 % biodegradation after 28 days but withoutreaching the 10-day window. Thus, the test item was classified readily biodegradable, but failing 10-day window.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable but failing 10-day window
Additional information
The test substance DL-Panthenol was investigated for its ready biodegradability in a DOC Die Away Test over a period of 28 days according to EU method C.4 A and OECD guideline 301 A. The biodegradation was followed DOC removal during exposure. The biodegradation of DL-Panthenol was of 94% in 28 days. Therefore, DL-Panthenol was found to be biodegradable under the test conditions over the 28-day exposure to activated sludge. However, the pass level for ready biodegradability was not reached. According to OECD Guidelines, the pass level for ready biodegradability is 70% removal of DOC. This pass value has to be reached in a 10-day window within the 28-day period of the test. The 10-day window begins when the degree of biodegradation has reached 10% DOC and must end before Day 28 of the test. Based on the results of this test and using the classification range given in OECD-GHS and directive 67/548EEC, the ecotoxicological classification is "readily biodegradable, but failing 10 -day window".
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