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EC number: 941-064-8 | CAS number: -
- 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
Skin irritation / corrosion: No adverse effect observed (not irritating)
Eye irritation / corrosion: Adverse effect observed (irritating)
Key value for chemical safety assessment
Skin irritation / corrosion
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Eye irritation
Endpoint conclusion
- Endpoint conclusion:
- adverse effect observed (irritating)
Additional information
Justification for selection of skin irritation / corrosion endpoint:
Salt reaction of cobalt (2+) and C3/C10 carboxylates composition is
a combination of cobalt (2+) propionate and neodecanoic acid cobalt salt
tested for skin and eye irritation. Conclusions of the studies carried
out on these 2 compounds can thus be used as worst case scenario for the
Salt reaction of cobalt (2+) and C3/C10 carboxylates.
Reliable in vivo skin irritation study described in Kukulinski (2013) on
neodecanoic acid cobalt salt (OECD 404, GLP compliant) and reliable in
vitro skin irritation study described in Heppenheimer (2010) on cobalt
(2+) propionate (OECD 439, GLP compliant) are considered to be reliable
without restrictions. The Salt reaction of cobalt (2+) and C3/C10
carboxylates was thus determined to be not irritating for the skin.
Justification for selection of eye irritation endpoint:
Salt reaction of cobalt (2+) and C3/C10 carboxylates composition is
a combination of cobalt (2+) propionate and neodecanoic acid cobalt salt
tested for skin and eye irritation. Conclusions of the studies carried
out on these 2 compounds can thus be used as worst case scenario for the
Salt reaction of cobalt (2+) and C3/C10 carboxylates.
Two reliable in vivo study described by Sanders (2012) and Arcelin
(2011) (OECD 405; GLP complaint) are considered to be reliable without
restrictions. Based on Arcelin study result considered as worst case
scenario, the Salt reaction of cobat (2+) and C3/C10 carboxylates was
thus determined to be irritating to the eyes.
Effects on eye irritation: irritating
Justification for classification or non-classification
Skin corrosion:
Two reliable in vitro studies described by Heppenheimer are considered to be reliable without restrictions and will be used for classification.
The overall irritation results in in-vitro human skin model tests (according to OECD 431; GLP compliant) are as follows:
- Neodecanoic acid cobalt salt:
- relative viability 3 min after treatment: 108.1 %
- relative viability 60 min after treatment: 45.7 %
- Cobalt(2+) propionate:
- relative viability 3 min after treatment: 84.4 %
- relative viability 60 min after treatment: 57.9 %
The classification criteria according to Regulation (EC) 1272/2008 as corrosive to skin are not met since the relative viability after 3 and 60 minutes exposure was above 50 % and 15% respectively, hence the 2 substances tested were determined to be not corrosive to the skin. Accordingly the substance salt reaction of Cobalt (2+) and C3/C10 carboxylates does not need to be classified as skin corrosive.
Skin irritation:
Two reliable in vitro studies described by Heppenheimer are available. The mean relative absorbances (% of the negative control, correlating with mean tissue viability) after 15 minutes incubation in the in-vitro human skin model test (EpiSkin, according to OECD 439; GLP compliant) were as follows for the 2 substances tested:
- Neodecanoic acid, cobalt salt: relative viability = 11.7%
- Cobalt(2+) propionate: relative viability = 71.2%
The neodecanoic acid cobalt salt was determined to be a skin irritant since the mean tissue viability was below the threshold for skin irritants of 50.0%, whereas cobalt(2+) propionate was determined not to be a skin irritant.
Testing requirements in other international schemes necessitated an in vivo test for neodecanoic acid cobalt salt (Kukulinski, 2013). Since in vivo test results should take precedence over in vitro test results, the results received from this in vivo test are taken forward for the chemical hazard assessment.
According to Kukulinski (2013) the overall irritation results 24, 48 and 72 hours after application per animal are as follows (according to OECD 404):
- erythema: 1, 2, 1.33
. oedema: 0.67 for all three animals
The classification criteria acc. to regulation (EC) 1272/2008 as irritating to skin are not met, since the values of erythema and oedema were below the threshold of ≥2.3 as well as the effects were fully reversible within 48 hours.
Accordingly,the salt reaction of Cobalt (2+) and C3/C10 carboxylates will not be classified as skin irritant.
Eye irritation:
Two reliable in vitro studies described by Heppenheimer are considered to be reliable without restrictions and will be used for classification.
The mean in-vitro scores after 240 minutes incubation results of the in vitro bovine corneal opacity and permeability assay (BCOP, according to OECD TG 437; GLP compliant) were respectively 0.00 for neodecanoic acid cobalt salt and 0.29 for cobalt(2+) propionate. The values were below the threshold for severe eye irritants of 55.1.
The classification criteria according to regulation (EC) 1272/2008 as severe eye irritation are not met, hence no classification required for the 2 substances tested. Accordingly the substance salt reaction of Cobalt (2+) and C3/C10 carboxylates does not need to be classified neither as corrosive nor severely irritating to the eyes.
Two in-vivo studies described by Arcelin (2011) and Sanders (2012) are also considered to be reliable without restrictions and will be also used for classification.
During the Sanders study, neodecanoic acid cobalt salt was applied to one eye of two animals each and the eye irritation was scored according to the Draize scale. The overall irritation results 24, 48 and 72 hours after application per animal are as follows:
- Corneal opacity= 0 for both animals
- Iris light reflex= 0 for both animals
- Conjunctival redness=0.67 and 0.33
- Conjunctival oedema (chemosis) = 0.33 and 0
The classification criteria according to Regulation (EC) 1272/2008 as irritating to eyes are not met for neodecanoic acid cobalt salt, since the values of conjunctival redness and chemosis were below the threshold of ≥ 2 as well as the effect was fully reversible within 48 hours and 72 hours, respectively.
According to Arcelin (2011) the overall irritation results 24, 48 and 72 hours after application of cobalt(2+) propionate per animal are as follows:
- Corneal opacity = 0.00 for all three animals
- Iris light reflex = 0.00 for all three animals
- Conjunctival redness = 1.67, 2.33, 2.00
- Conjunctival oedema = 0.00, 0.33, 0.00
The classification criteria according to Regulation (EC) 1272/2008 as irritating to eyes are met for cobalt(2+) propionate, since conjunctival redness was above the threshold of ≥2 as well as the effect were fully reversible within 7 days. Only in one animal conjunctival redness was not fully reversible within 14 days. The animal was further affected up to at least 14 days after treatment. The ocular findings consisted of scleral and conjunctival reddening as well as discharge (with mucus) and were considered as being a secondary effect (infection).
Thus, in a conservative approach, the salt reaction of Cobalt (2+) and C3/C10 carboxylates will be classified as eye irritant category 2 (H319).
Respiratory irritation:
The justification for classification as respiratory irritant is covered under the endpoint specific target organ toxicity- single exposure: inhalation as given in the acute toxicity section.
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