Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no hazard identified

Marine water

Hazard assessment conclusion:
no hazard identified

STP

Hazard assessment conclusion:
no hazard identified

Sediment (freshwater)

Hazard assessment conclusion:
no hazard identified

Sediment (marine water)

Hazard assessment conclusion:
no hazard identified

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

The poorly soluble substance Cobalt zinc aluminate blue spinel is evaluated is evaluated by comparing the dissolved metal ion levels resulting from the transformation/dissolution test after 7 and 28 days at a loading rate of 1 mg/L with the lowest acute and chronic ecotoxicity reference values (ERVs) as determined for the (soluble) metal ions.


 


The acute ERVs are based on the lowest EC50/LC50 values for algae, invertebrates and fish. Acute ERVs were obtained from the Metals classification tool (MeClas) database as follows: Acute ERVs for aluminium are 1,040 µg Al/L at pH 6 and 3,390 µg Al/L at pH 8. The acute ERV for cobalt is 52.0 µg Co/L, and for zinc the acute ERVs are 413 µg Zn/L at pH 6 and 136 µg Zn/L at pH 8. Cobalt and zinc ion concentrations remained below the LOD (i.e. < 0.11 µg Co/L and < 0.07 µg Zn/L, respectively) after 7 days in the T/D test and are thus well below respective ERVs. Thus, only aluminium concentrations are taken into account. The dissolved aluminium concentration of 48.75 µg Al/L in the T/D test after 7 days at pH 6 is significantly lower than the lowest short-term ERVs (1,040 µg Al/L and 3,390 µg Al/L at pH 6 and 8, respectively). Hence, the substance Cobalt zinc aluminate blue spinel is not sufficiently soluble to cause short-term toxicity at the level of the acute ERVs (expressed as EC50/LC50).


 


In accordance with Figure IV.4 “Classification strategy for determining acute aquatic hazard for metal compounds” of ECHA Guidance on the Application of the CLP Criteria (Version 5.0, July 2017) and section 4.1.2.10.2. of Regulation (EC) No 1272/2008, the substance Cobalt zinc aluminate blue spinel is poorly soluble and does not meet classification criteria for acute (short-term) aquatic hazard.


 


The chronic ERVs are based on the lowest EC10/NOEC values for algae, invertebrates and fish. In accordance with the Classification and Labelling Committee in 1999 (see report 013-003-00-7 submitted to the C&L Committee, 1999) a chronic ERV for dissolved aluminium ions has not been derived since a concern for long-term (chronic) toxicity of aluminium ions was not identified (no classification). Due to the lack of a chronic hazard potential for dissolved aluminium ions, only cobalt and zinc concentrations and the respective chronic ERVs are taken into account. Respective chronic ERVs were obtained from the Metals classification tool (MeClas) database and are for cobalt 7.6 µg Co/L, for zinc 82 µg Zn/L at pH 6 and 19 µg Zn/L at pH 8. Since cobalt and zinc ion concentrations remained below the LOD (i.e. < 0.11 µg Co/L and < 0.07 µg Zn/L, respectively) during the 28-days T/D test and are well below respective chronic ecotoxicity ERVs, there is not a concern for long-term (chronic) toxicity of cobalt and zinc ions. Hence, the substance Cobalt zinc aluminate blue spinel is not sufficiently soluble to cause long-term toxicity at the level of the chronic ERVs (expressed as NOEC/EC10).


 


In accordance with Figure IV.5 „Classification strategy for determining long-term aquatic hazard for metal compounds “of ECHA Guidance on the Application of the CLP Criteria (Version 5.0, July 2017) and section 4.1.2.10.2. of Regulation (EC) No 1272/2008, the substance Cobalt zinc aluminate blue spinel is poorly soluble and does not meet classification criteria for chronic (long-term) aquatic hazard.


 


In sum, the substance Cobalt zinc aluminate blue spinel is poorly soluble and does not meet classification criteria of Regulation (EC) No 1272/2008 for acute (short-term) and chronic (long-term) aquatic hazard.