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EC number: 231-072-3
CAS number: 7429-90-5
For an inorganic substance for which the chemical assessment is based on the elemental concentration, biotic degradation is an irrelevant process.
Annex VIII states that "Further degradation
testing shall be considered if the chemical safety assessment according
to Annex I indicates the need to investigate further the degradation of
the substance. The choice of the appropriate test(s) will depend on the
results of the chemical safety assessment. "
Waiving of the need for data for this
endpoint in the aquatic compartment may be considered if “The substance
is highly insoluble in water”, or if “The substance is readily
biodegradable” (ECHA 2008, Chapter R.7B – Endpoint Specific Guidance).
However, for an inorganic substance for which
the chemical assessment is based on the elemental concentration (i. e.,
pooling all inorganic speciation forms together), biotic degradation is
an irrelevant process: biotic processes may alter the speciation form of
an element, but it will not eliminate the element from the aquatic
compartment by degradation or transformation. This elemental-based
assessment (pooling all speciation forms together) can be considered as
a worst-case assumption for the chemical assessment.
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.
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