Registration Dossier
Registration Dossier
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EC number: 224-929-8 | CAS number: 4559-86-8
Endpoint summary
Administrative data
Description of key information
Additional information
The ready biodegradation of tetrabutyl urea (TBU) was investigated in a study conducted according to OECD Guideline 301F over a period of 28 days and using activated sludge as inoculum collected from a sewage treatment plant treating mainly municipal wastewater. TBU proved to be not readily biodegradable under the test conditions employed (<=1.3% biodegradation after 28 d). The functional control reached the pass level > 60% after 14 d. In the toxicity control containing both test and reference item 32.2% biodegradation occurred within 14 d thus indicating that TBU was not inhibitory to the inoculum at the concentration tested.
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