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EC number: 237-358-4 | CAS number: 13762-14-6
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Toxicity to aquatic plants other than algae
Administrative data
Link to relevant study record(s)
Description of key information
EC50 (4d) = 0.52 mg cobalt molybdenum oxide/L (Spirodela polyrhiza) for growth rate (read-across from cobalt chloride)
Key value for chemical safety assessment
- EC50 for freshwater plants:
- 0.52 mg/L
Additional information
No data on the toxicity to aquatic plants other than algae are available for the test substance cobalt molybdenum oxide. However, there are reliable data available for different structurally analogue substances.
The environmental fate pathways and ecotoxicity effects assessments for cobalt metal and cobalt compounds as well as for molybdenum metal and molybdenum 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 and molybdenum substances used in the ecotoxicity tests. Therefore, data from soluble cobalt and molybdenum substances are used in the derivation of ecotoxicological and environmental fate endpoints, based on the cobalt ion and molybdenum ion, respectively.
Cobalt
Data on chronic single-species toxicity tests resulting in high quality EC50 values (expressed as Co) for aquatic plants are summarised in the WHO CICAD, 2006 (see attached table).
Results are available for Spirodela polyrhiza (Gaur et al.,
1994) and Azolla pinnata (WHO CICAD, 2006)with EC50 (4d) values
of 0.14 and 0.24 mg Co/L, respectively, equivalent to recalculated
values of 0.52 and 0.89 mg cobalt molybdenum oxide/L, respectively.
In the key study, the effects of cobalt chloride on greater duckweed (Spirodela
polyrhiza) were investigated in a static 4-d test at nominal
concentrations of 0.85, 1.7, 8.5, 17.0 and 85.0 µM Co (Gaur et al.,
1994). As a result, an EC50 of 0.14 mg Co/L was obtained for growth,
equivalent to 0.52 mg cobalt molybdenum oxide/L.
Further results for aquatic plants are available and comprised in the
attached table.
References: World Health Organization (2006). Concise International Chemical Assessment Document 69.COBALT AND INORGANIC COBALT COMPOUNDS.
Molybdenum
Freshwater:
The toxicity of molybdenum to freshwater aquatic plants was tested by De Schamphelaere et al. (2008) on Lemna minor, resulting in a 7d-ErC10 of 241.5 mg Mo/L.
Marine:
The toxicity to of molybdenum to marine aquatic plants was investigated on the red macroalgae Ceramium tenuicorne by Le Page et al. (2010). As a result, a 7d-ErC10 of 274 mg Mo/L was obtained.
Conclusion
As
the effect values derived from analogue cobalt compounds are
considerably lower than those derived from analogue molybdenum
substances, it can be reasoned that the cobalt ion will account for the
effects in ecotoxicological testing. Hence, it was concluded to put
forward the most sensitive and reliable results derived from analogue
cobalt compounds for assessment purposes, and recalculate them for
CoMoO4.
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