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: 220-778-7
CAS number: 2896-70-0
Studies performed on 2,2,6,6-tetramethyl-4-oxo-piperidinooxy (4-Oxo
Tempo) demonstrated the hydrolytic stability of the substance and the
absence of ready biodegradability. In a guideline
study (Fox, 2012), the half-life with respect to hydrolysis was
extrapolated to be > 1 year at 25oC, a further guideline
study (Commander, 2012) showed biodegradation of <2.6% over a 28 day
period, significantly below the criteria laid out for ready
Biodegradation studies in additional aquatic compartments were not
considered necessary as based on the exposure scenarios in the chemical
safety report, direct or indirect exposure to the environment is
The bioaccumulation or adsorption/desorption potential of the test
substance was not defined by experimental data however based on the
physical chemical properties of the substance (Log Kow 0.28 and water
solubility 216 g/L) the substance is not expected to bioaccumulate or
absorb. No further testing was considered necessary.
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.
Deze website maakt gebruik van cookies om het surfen zo aangenaam mogelijk te maken.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Do not show this message again