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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 291-367-8 | CAS number: 90387-90-9
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
The n-octanol/water partition coefficient (Kow) is defined as the ratio of the equilibrium concentrations of a dissolved substance in a 2-phase system consisting of the largely immiscible solvents n-octanol and water.
Kow = [X]n-octanol / [X]water
(where [X] indicated the concentration (mass/volume) in the specific solvent)
Octanol is regarded as a model solvent that mimics lipids in organisms and humans, and organic carbon in oils and sediments. (Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance; p. 100)
According to column 2 of Annex VII (standard information requirements for substances manufactured or imported in quantities of 1 tonne or more) of Regulation (EC) No 1907/2006, a study does not need to be conducted if the substance is inorganic.
Graphite, acid-treated is an inorganic solid, consisting of natural graphite and variable amounts of either intercalated nitric acid or acetic acid.
Due to the inorganic character of the substance, performance of a study to determine the partition coefficient is not required under Regulation (EC) No 1907/2006 (REACH).
Key value for chemical safety assessment
Additional information
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.
