Registration Dossier
Registration Dossier
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EC number: 283-815-6 | CAS number: 84731-55-5
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
The adsorption/desorption study was not conducted as lithium isooctadecanoate decomposes rapidly to carbon dioxide, water and lithium ions. Metals such as sodium, potassium, calcium and lithium are expected to behave similarly, with ions in the aqueous environment remaining in solution. Lithium is a naturally occurring element and its adsorption/desorption is not expected to be scientifically relevant.
Key value for chemical safety assessment
Additional information
In accordance with column 2 of REACH Annex VIII, the adsorption/desorption study does not need to be conducted as lithium isooctadecanoate is readily biodegradable and its relevant degradation products decompose rapidly. The dissociation and biodegradation in the environment of the substance would result in carbon dioxide, water and lithium ions. Stable degradation products from the organic component are not formed in the environment.
No data for adsorption/desorption was included in the REACH dossiers for lithium carbonate, lithium chloride or lithium hydroxide. No data are available on the partition coefficient of lithium as, in accordance with column 2 of REACH Annex VII, the partition coefficient study does not need to be conducted as this substance is inorganic. Metals such as sodium, potassium, calcium and lithium are expected to behave similarly, with ions in the aqueous environment remaining in solution. Lithium is a naturally occurring element, “found in small amounts in nearly all igneous rocks and in the waters of many mineral springs” (Lide 2009) and the adsorption/desorption of lithium in the environment is not expected to be scientifically relevant.
In most cases the reaction to form the grease thickener occursin situin base oil during the grease manufacturing process and consequently the grease thickener normally only exists in the base oil matrix. In realistic use scenarios, the thickeners will be contained in base oil, with the formulated greases specifically designed to minimise the leaching of the thickener. As such, and given the very low solubility of the substance in water, the concentration of the substance which would be available for adsorption to soil or sediment is limited.
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.
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