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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 701-160-0 | CAS number: -
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
No experimental determination of partition coefficient has been carried out according to the fact that the substance is inorganic. A recent article (Petersen, 2010) has shown that the standard OECD TG 107 is not readily applicable to TMWCNTs and that, contrary to hydrophobic substances there is no relationship between the observed partitioning and the potential for bioaccumulation.
Key value for chemical safety assessment
Additional information
In a recent article, Petersen et al. (Env. Tox. and Chem. 2010, vol. 29, 1106 -1112) address the relevance of octanol-water partitioning to the potential uptake of MWCNTs by organisms. They observe an unusual behaviour when carrying out the OECD TG 107 test (shake flask method) in that the MWCNTs do not cross the interface between to 2 medias and therefore do not partition according to lipophilicity. In addition, there is no relationship between partitioning and uptake by organisms (worms), with apparently no absorption across the gut tissues.
Consequently logKow can be considered not only as a technical issue with TMWCNTs but also as a poor descriptor of bioaccumulation potential.
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.
