Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 295-033-2 | CAS number: 91782-61-5
Relevant and reliable data that could be used for classification for freshwater invertebrates were retrieved for 10 different species. The LC50s ranged from 0.61 mg Co/L for the cladoceran, Ceriodaphnia dubia to 429 mg Co/L for the midge, Chironomus tentans. Relevant and reliable data that could be used for classification for marine invertebrates were retrieved for 4 different species. The LC50s ranged from 2.32 mg Co/L for the sand dollar, Dendraster excentricus to 3.70 mg Co/L for the pacific oyster, Crassostrea sp. Test results were obtained in experiments that followed international accepted guidance and were based on measured levels of dissolved cobalt as cobalt chloride.
From the database of acute cobalt toxicity to freshwater invertebrates, 85 individual LC50 values for 10 different individual species were reported. The LC50s ranged from 0.61mg Co/Lfor the cladoceran, Ceriodaphnia dubia tested in soft, dissolved organic matter-free water (CDI, 2005) to 429 mg Co/L for the midge, Chironomus tentans (CDI, 2008). No freshwater acute invertebrate toxicity studies were used to derive the HC5 and freshwater PNEC.
From the database of acute cobalt toxicity to marine invertebrates, 20 NOEC and EC50 values are reported for 6 species. The values range from 2.32 mg Co/L for the sand dollar, Dendraster excentricus (CDI 2010f) to 3.70 mg Co/L for the pacific oyster, Crassostrea sp.(CDI 2010e). The table below represents the EC50 values of high quality studies.
No short-term freshwater aquatic invertebrate tests are used in the freshwater PNEC derivation. Marine short-aquatic invertebrate tests are used in the marine PNEC derivation; see Section 22.214.171.124.2.
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.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Close Do not show this message again