Registration Dossier
Registration Dossier
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EC number: 269-049-5 | CAS number: 68186-87-8 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77347.
Endpoint summary
Administrative data
Description of key information
Pigment cobalt zinc aluminate blue spinel (CAS 68186-87-8) is an odourless blue powder.
- Melting point of the pigment is > 1000 °C.
- Relative density: 4.49.
- Particle size distribution: D50 = 2.4 µm, D90 = 5.2 µm, D10 = 0.8 µm
- Dustiness:
total: 100.35 mg/g
MMAD= 49.04 µm, GSD= 7.72
Fractional deposition in human respiratory tract: Head (ET): 42.5 %, Tracheobronchial (TB): 0.6 %, Pulmonary (PU): 0.7 %
-Transformation/dissolutio, pH6 (pH that maximises dissolution)
The dissolved concentrations of zinc and cobalt at a 1 mg/l loading after 7 and 28 days and a 100 mg/l loading after 7 days were below the LOD (0.07 µg/L and 0.11µg/L) and therefore not determinable.
The dissolved concentrations of aluminium at a 100 mg/l loading after 7 days were 76.43 µg/L .
The dissolved concentrations of aluminium at a 1 mg/l loading after 7 and 28 days were 48.75 µg/L and 23.48 µg/L, respectively .
Additional information
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