Registration Dossier
Registration Dossier
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EC number: 258-476-2 | CAS number: 53320-86-8
Sediment toxicity
Administrative data
Link to relevant study record(s)
- Endpoint:
- sediment toxicity: long-term
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
- Reason / purpose for cross-reference:
- other: see Remarks
- Remarks:
- general substance background and toxicokinetics summary
Reference
Description of key information
Further testing is not required as per REACH Annex XI, sections 2 and 3 and/or Annex X, column 2, section 9.5.1.
Long-term sediment toxicity testing has been waived based on the results of the chemical safety assessment not indicating the need to further investigate the effect of the substance on sediment organisms.
Key value for chemical safety assessment
Additional information
If released to the environment, the substance is expected to combine indistinguishably with the soil or sediment due to its similarity with inorganic soil/sediment matter and will be subjected to natural processes under environmental conditions (cation exchange, dissolution, sedimentation). Furthermore the amounts released are negligible in comparison to the release by natural deposit or alteration.
Furthermore, this substance is essentially an artificial sediment in itself by virtue of the fact that it is a synthetic smectite clay, which is found abundantly in nature in soils and sediments in lakes, river beds and marine environments. The definition of sediment is as follows: Sediment: is a mixture of mineral and organic chemical constituents, the latter containing compounds of high carbon and nitrogen content and of high molecular masses. It is deposited by natural water and forms an interface with that water. The material is non-biodegradable, retaining its clay structure in the environment. At normal environmental pHs, this material is stable. It does not dissolve in water but disperses to form a clear sol and in the pH range 4 – 9 does not hydrolyse. In addition to the material potentially being classed as an artificial sediment in its own right, it is unlikely through normal use patterns that it would reach exposure to natural sediments.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.
