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EC number: 269-102-2 | CAS number: 68187-50-8 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77498.
- 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
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.6 µg/L
- Extrapolation method:
- sensitivity distribution
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 2.36 µg/L
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 0.37 mg/L
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 9.5 mg/kg sediment dw
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 9.5 mg/kg sediment dw
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 10.9 mg/kg soil dw
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
As defined in Part B, Section 1 of the Chemical Safety Report, the substance is an inorganic compound with very low solubility. Therefore, there are no mandatory testing requirements for any of the required ecotoxicological endpoints. As a result, the determination of PNEC levels for this substance itself that are based on ecotoxicological studies cannot be conducted.
A transformation/dissolution test according to OECD 29 with the substance, however, demonstrated that small amounts of the individual inorganic building block (i.e., the element Cobalt) could be released in aqueous media. Therefore, the PNECs presented are based on Co and not on the substance itself.
It was shown in a screening test according to OECD 29 that the highest release of Co occurred at pH 6.0. Therefore, it was decided to conduct the full test at the most relevant pH with respect to ecotoxicology, i.e. at acidic pH value. For the Co-cation, the acute ERV is 52.0 µg/L and the chronic ERV is 7.6 µg /L for acidic and alkaline pH values. The acute and chronic (ERVs) which are comparable to the most sensitive aquatic ecotoxicological endpoint were taken from the report "Cobalt REACH Consortium: Classification proposals for ‘ERV’ and ‘TDp’ substances, v4.1 – May 2017 (attached chapter 13 in IUCLID).
Conclusion on classification
The transformation and dissolution of Co-cation from the substance was evaluated according to the T/D Protocol (OECD 29) (transformation/dissolution protocol, see section 4.8).
The full test was performed at 1, 10 and 100 mg/L loadings for 7 days and at 1 mg/L loading for 28 days and at the pH of maximum release of the most metals, i.e. at pH = 6.0.
The acute and chronic Ecotoxicity Reference Values (ERVs) for Co were taken from a document prepared by Cobalt Reach Consortium (2017): The acute ERV is 52 µg Co/L and the chronic ERV is 7.6 µg Cr/L for acidic and alkaline pH values. The mean concentration of three replicates/concentrations was 4.38, 31.50 and 103.73 µg Co/L at a loading rate of 1, 10 and 100 mg/L and after 7 days. The measured Co-concentrations at a loading rate of 1 and 10 mg/L are below the acute ERV and thus, no acute classification has to be applied according to CLP.
After 28 days and a loading of 1 mg/L, the mean measured concentration was 5.07 µg Co/L. This concentration is lower than the chronic ERV and thus no chronic classification has to be applied to the substance according to CLP.
In conclusion, the results according to the T/D Protocol compared with the ERVs for the most ecotoxicological relevant metals of the substance shows that the substance has not to be classified according to CLP.
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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