Registration Dossier
Registration Dossier
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EC number: 272-713-7 | CAS number: 68909-79-5 An inorganic pigment that is the reaction product of high temperature calcination of principally chromium (III) oxide forming a crystalline hematite. Its composition may include any one or a combination of the modifiers Al2O3, Fe2O3, or Mn2O3.
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
The pigment hematite chromium green black is environmentally and biologically inert due to the characteristics of the synthetic process (calcination at high temperatures, approximately 1000 °C), rendering the substance to be of a unique, stable crystalline structure in which all atoms are tightly bound and not prone to dissolution in environmental and physiological media. Based on the resulting physico-chemical properties, especially the high insolubility of the pigment under environmental conditions, demonstrated by (Pardo Martinez, 2010) via transformation/dissolution testing (7 and 28 days), the substance can be expected to not have a potential to cross or adsorb to biological membranes. Therefore, no reversible or irreversible adverse toxicological effects on aquatic or terrestrial life-forms are expected, and a PNEC derivation is scientifically not justifiable.
Conclusion on classification
Based on the high insolubility of the pigment under environmental conditions, demonstrated by (Pardo Martinez, 2010) via transformation/dissolution testing (7 and 28 days), no reversible or irreversible adverse toxicological effects on aquatic or terrestrial organisms are expected. Hence no environmental classification is required.
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