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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Hazard for aquatic organisms

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

The ecotoxicity databases on the effects of soluble cobalt compounds to aquatic, soil- and sediment-dwelling organisms are extensive. It should be noted that the environmental fate pathways and ecotoxicity effects assessment of cobalt hydrogen citrate is based on the assumption that adverse effects to aquatic, soil- and sediment-dwelling organisms are a consequence of exposure to the bioavailable cobalt ion, released by the parent substances. 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 chronic ecotoxicological NOEC and L(E)C10 values. If both NOEC and L(E)C10 data are available for a given species, the L(E)C10 value was used in the effects assessment.

Conclusion on classification

Classification related key information

Water solubility: 27.65 g/L (OECD 105)

Biodegradation in water: 68% after 28 d (OECD 301C)

Aquatic acute toxicity:

to fish:                              96 h, LC50(Danio rerio):                              > 135 mg/L, cobalt citrate

to algae:                           72 h, ErC50(Desmodesmus subspicatus):       2.15 mg/L, cobalt citrate

to aquatic invertebrates:       48 h, EC50(Daphnia magna):                      40.4 mg/L, cobalt citrate

 

Aquatic chronic toxicity:

to fish:                             16 d, NOEC (Brachydanio rerio):                      0.25 mg/L, RA

to algae:                           72 h, NOErC (Desmodesmus subspicatus):      0.15 mg/L, cobalt citrate

to aquatic invertebrates:      28 d, NOEC (Daphnia magna):                       0.012 mg/L, RA

 

Classification justification according to CLP

Based on the data above, there is evidence of rapid environmental transformation of cobalt hydrogen citrate. The acute aquatic toxicity L(E)C50 values are > 1 mg/L for fish, algae and aquatic invertebrates. Valid chronic toxicity data are available - the lowest NOEC is 0.012 mg/L for Daphnia and was chosen as chronic Environmental Reference Value.

Therefore, cobalt hydrogen citrate needs to be classified and labelled as environmental hazard Chronic Cat. 2 according to the Regulation (EC) No.1272/2008 (CLP) and the Regulation (EU) No. 286/2011 (2ndATP).

 

M-factor for acute aquatic toxicity:     -
M-factor for chronic aquatic toxicity:   -

 

Classification justification according to DSD

Based on the data above, there is evidence of rapid environmental transformation of cobalt hydrogen citrate. The acute aquatic toxicity L(E)C50 values are > 1 mg/L for fish, algae and aquatic invertebrates. Valid chronic toxicity data are available - the lowest NOEC is 0.012 mg/L for Daphnia and was chosen as chronic Environmental Reference Value.

Therefore, cobalt hydrogen citrate needs to be classified and labelled as environmental hazard R51/53 according to Directive 67/548/EEC.