Registration Dossier
Registration Dossier
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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: 910-697-1 | CAS number: -
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
As stated in ECHA guidance R7b (p. 204 v. June 2017), even though biological processes may accelerate the transformation of some simple inorganic substances, they may not normally degrade biotically. As a consequence, biodegradability testing of inorganic substance is not worth doing. In the case of reaction mass of CaF2, CaSO4 and CaCO3, dissociation of the soluble salt is a relevant transformation of the substance.
Key value for chemical safety assessment
Additional information
Reaction mass of calcium fluoride, calcium sulfate and calcium carbonate is an inorganic substance and does not undergo biodegradation i.e. microbial degradation to carbon dioxide and water, since it doesn’t contain any carbon or hydrogen atoms in its chemical formula. Reaction mass of calcium fluoride, calcium sulfate and calcium carbonate will be degraded in the environment by means other than biodegradation. The ions will dissociate into fluoride, sulfate, carbonate and calcium ions.
Once released into the environment, calcium fluoride will ionise to a limited extent to form calcium and fluoride ions which will combine with various minerals to form a variety of other fluoride compounds. Calcium will be assimilated by species in the water and is necessary to maintain a good chemical balance in soils, water and plants, carbonate will become part of the carbon cycle, and the sulfate will become part of the sulfur cycle or be assimilated by microorganisms and other species that require sulfate as an essential substance in their biological systems/ processes.
Therefore, biodegradation in water and sedimentation studies (simulation tests) do not need to be conducted.
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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