Registration Dossier
Registration Dossier
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EC number: 271-411-2 | CAS number: 68555-06-6 An inorganic pigment that is the reaction product of high temperature calcination in which chromium (III) oxide, iron (III) oxide, and manganese (III) oxide in varying amounts are homogeneously and ionically interdiffused to form a crystalline matrix of spinel.
Ecotoxicological Summary
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
Proprietary studies are not available for spinels, chromium iron manganese brown. The poorly soluble substance spinels, chromium iron manganese brown 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 ERVs are based on the lowest EC50/LC50 and NOEC/EC10 values for algae, invertebrates and fish, respectively. Acute and chronic ERVs were obtained from the Metals classification tool (MeClas) database as follows: The acute ERVs of trivalent chromium (> 100 mg Cr/L), iron (>100 mg Fe/L) and manganese (3.2 mg Mn/L) ions are above 1 mg/L and thus a concern for short-term (acute) toxicity was not identified (no classification). According to ECHA Guidance on the Application of the CLP Criteria (Version 5.0, July 2017), “Where the acute ERV for the metal ions of concern is greater than 1 mg/L the metals need not be considered further in the classification scheme for acute hazard.” Due to the lack of an aquatic hazard potential for trivalent chromium, iron and manganese ions and the fact that dissolved chromium and iron concentrations remained below the LOD of 0.5 µg/L and manganese concentrations below the LOQ of 1 µg/L after 7 days at pH 6 and a loading of 1 mg/L in the T/D test, it can be concluded that the substance spinels, chromium iron manganese brown 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 spinels, chromium iron manganese brown is poorly soluble and does not meet classification criteria for acute (short-term) aquatic hazard.
Regarding long-term toxicity, the chronic ERVs of trivalent chromium and iron ions are also above 1 mg/L, respectively, and a concern for long-term (chronic) toxicity was not identified (no classification). According to ECHA Guidance on the Application of the CLP Criteria (Version 5.0, July 2017), ”Where the chronic ERV for the metal ions of concern corrected for the molecular weight of the compound (further called as chronic ERV compound) is greater than 1 mg/L, the metal compounds need not to be considered further in the classification scheme for long-term hazard.” The chronic ERV for manganese amounts to 550 µg Mn/L whereas dissolved manganese concentrations after 28-days T/D at pH remained below the LOQ of 1 µg/L. Due to the lack of a chronic aquatic hazard potential for trivalent chromium and iron ions and the fact that after 28 days T/D at pH 6 and a loading of 1 mg/L, dissolved chromium and iron concentrations remained below the LOD of 0.5 µg/L and dissolved manganese concentrations below the LOQ of 1 µg/L and well below the chronic ERV of 550 µg Mn/L, it can be concluded that the substance spinels, chromium iron manganese brown is not sufficiently soluble to cause long-term toxicity at the level of the chronic ERVs (expressed as NOEC/EC10, respectively).
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 spinels, chromium iron manganese brown is poorly soluble and does not meet classification criteria for chronic (long-term) aquatic hazard.
In sum, the substance spinels, chromium iron manganese brown 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.
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