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EC number: 200-755-8 | CAS number: 71-48-7
- 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

Endpoint summary
Administrative data
Description of key information
Additional information
Cobalt di(acetate) readily dissociates in aqueous solution into free cobalt ions and acetic acid. The pKa of 7.75 indicates that at pH values below, cobalt(di)acetate is almost completely dissociated, wherease the percentage decreases at higher pH values. Therefore an ecotoxicological risk assessment for the aquatic compartment by means of the dissociation products of cobalt di(acetate) is appropiate. There are sufficient data available for both dissociation products. The main conclusions are given below.
a) The inorganic component (cobalt) is acute and chronic toxic to aquatic organisms: Fish LC50 (96h) = 1.4 mg/L cobalt; Daphnia LC50 (48h) = 1.1 mg/L cobalt; Algae (96h) EC50 = 0.56 mg/L cobalt; Fish NOEC (16d) = 0.06 mg/L cobalt (survival); Daphnia NOEC (21d) = 0.005 mg/L cobalt.
b) The organic component (acetic acid CAS: 64-19-7) is not toxic to aquatic organisms: Fish LC50 (48h) = 410 mg/L; Daphnia LC50 (24h) = 6000 mg/L; Algae EC10 (8d) = 4000 mg/L.
These data markedly show, that the toxic component of cobalt(acetate) is cobalt. It is generally accepted, that the principal toxic component of various cobalt salts is cobalt (dependent on the corresponding anion) (see also: CICAD 69). Therefore toxicity values for cobalt compounds (such as: cobalt salts), where the major toxic component is cobalt, can be considered as equivalent. Consequently, data from other cobalt salts or- compounds have been used to fill data gaps within this dossier.
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