Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- other:
- Reason / purpose for cross-reference:
- data waiving: supporting information
Reference
Description of key information
In accordance with REACH Annex XI, section 2, “testing for a specific endpoint may be omitted, if it is technically not possible to conduct the study as a consequence of the properties of the substance”.
"Neutralisation and reduction products of bauxite residue from refinement process" is poorly soluble in water. Since adsorption/desorption testing requires the test substance to be dissolved in aqueous medium, testing of the adsorption/desorption behaviour of "Neutralisation and reduction products of bauxite residue from refinement process" as such is technically not feasible.
Therefore, "Neutralisation and reduction products of bauxite residue from refinement process" as such cannot be tested for adsorptive properties.
Key value for chemical safety assessment
Additional information
"Neutralisation and reduction products of bauxite residue from refinement process" undergoes transformation/dissolution in contact with water, predominantly forming different species of aluminium ions.
The adsorption/desorption from the soluble fraction of aluminium ions generated in contact with water is influenced and at the same time also superimposed by other effects occurring in soil, rendering it impossible to measure only the adsorption behaviour of soluble aluminium deliberately added to soil matrix in an experimental setup. In view of the high abundance of aluminium in soil, aluminium deliberately added to the soluble fraction in laboratory experiments is indistinguishable from soil-originated aluminium, preventing quantification of the test material; accordingly, differentiation of adsorption and desorption processes is technically not feasible.
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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