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.
Endpoint summary
Administrative data
Description of key information
Hematite chromium green black (CAS 68909-79-5) is an inorganic, green, odourless powder.
- Melting point > 1000 °C
- relative density: 4.93.
- Particle size distribution: d10 = 1.4 µm, d50 = 3.8 µm, d90 = 8.7 µm
- Dustiness:
total: 41.02 mg/g
MMAD= 11.92 µm, GSD= 4.10
Fractional deposition in human respiratory tract: Head (ET): 55.2 %, Tracheobronchial (TB): 1.4 %, Pulmonary (PU): 4.00 %
- The transformation/dissolution
The dissolved concentrations of chromium and aluminium at a 1 mg/l loading after 7 and 28 days were below the LOD (0.5 µg/L) and therefore not determinable.
The dissolved concentrations of chromium at a 100 mg/l loading after 7 days were below the LOD (0.5 µg/L) .
The dissolved concentrations of aluminium at a 100 mg/l loading after 7 days were 2.4 µg/L .
Additional information
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