Registration Dossier
Registration Dossier
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EC number: 242-538-0 | CAS number: 18727-04-3
Endpoint summary
Administrative data
Description of key information
Additional information
No data on terrestrial toxicity are available for cobalt hydrogen citrate. However, there are reliable data available for different analogue substances.
The environmental fate pathways and ecotoxicity effects assessments for cobalt metal and cobalt compounds is based on the observation that adverse effects to aquatic, soil- and sediment-dwelling organisms are a consequence of exposure to the bioavailable ion, released by the parent compound. The result of this assumption is that the ecotoxicology will be similar for all soluble cobalt substances used in the ecotoxicity tests. Therefore, data from soluble cobalt substances are used in the derivation of ecotoxicological and environmental fate endpoints, based on the cobalt ion.
Information taken from WHO CICAD (2006):
There is little evidence of cobalt toxicity to plants due to elevated concentrations in soil. Cobalt tolerance, along with tolerance to other metals, has been found in plant populations growing on soils high in particular metals. Exclusion of the metal has been demonstrated in the cobalt tolerance of some species, whereas others growing on cobalt-rich copper clearings are hyperaccumulators of cobalt. Adverse effects on earthworm growth and springtail reproduction have been reported at 300–400 mg/kg dry weight. Data regarding the toxicity of cobalt to soil microorganisms are limited. In the terrestrial environment, adverse effects of cobalt on birds and wild mammals would appear unlikely, with cobalt deficiency in ruminants more likely than cobalt toxicosis (WHO CICAD, 2006).
References: World Health Organization (2006). Concise International Chemical Assessment Document 69. COBALT AND INORGANIC COBALT COMPOUNDS.
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