Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 448-050-6 | CAS number: 444065-11-6
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Not readily biodegradable: 11% biodegradation after 28 days (OECD 301B)
Key value for chemical safety assessment
Additional information
The biodegradation potential of 2-(4-tert-butylphenyl)-6-cyano-5-[bis(ethoxycarbonylmethyl)carbamoyloxy]-1 H-pyrrolo[1 ,2-b][1 ,2,4]triazole-7-carboxylic acid-2,6-di-tert-butyl-4-methyl-cyclohexyl ester (UC-141) was investigated in a study by Desmares-Koopmans (2003). This test was performed according to OECD Guideline 301B, under GLP conditions. The test substance was incubated at a concentration of ca. 18 mg/L (12 mgTOC/L), with domestic, non-adapted activated sludge for 28 days at 20 ± 2 °C. At the end of the test, UC-141 reached 13% and 9% biodegradation (replicates A and B respectively). Since the pass level of 60% was not achieved, the test substance is considered as not readily biodegradable. The results from the toxicity control containing test and reference substance (> 25% biodegradation within 14 days) indicate that UC-141 is not inhibitory to microorganisms’ activity.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
