Registration Dossier
Registration Dossier
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EC number: 233-899-5 | CAS number: 10421-48-4
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
In accordance with Column 2 of REACH Annex X, long-term toxicity testing with sediment organisms (required in Section 9.5.1) is not needed as the chemical safety assessment according to Annex I indicates that this is not necessary.
Key value for chemical safety assessment
Additional information
In accordance with Column 2 of REACH Annex X, long-term toxicity testing with sediment organisms (required in Section 9.5.1) is not needed as the chemical safety assessment according to Annex I indicates that this is not necessary.
Furthermore, although effects can be observed in some laboratory studies with sediment dwelling organisms, the lowest concentrations at which they have been found to occur are well below natural background concentrations (typically 4.5% dry weight in freshwater and marine sediment). Sediment organisms are adapted to background concentrations and laboratory test data indicating effects at concentrations below background therefore have no practical significance for setting PNECs.
Anoxic and low pH conditions in sediments may result higher concentrations of the more toxic ferrous iron species but such conditions are only conducive to supporting specialist species. Testing of species that are adapted to conditions of low pH and anoxia might be justified but only to investigate specific exposure scenarios.
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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