Registration Dossier
Registration Dossier
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EC number: 269-050-0 | CAS number: 68186-88-9 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77503.
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
Description of key information
Zinc iron chromite brown spinel: MMAD=89.90µm, GSD=8.08
Zinc iron chromite brown spinel: D50 = 1.4 µm
Additional information
Total Dustiness (airborne fraction): 23.51mg/g (experimental results, DMT Report).
Mass median aerodynamic diamater of airborne fraction: MMAD=89.90µm (distribution fitted to cascade impactor data). Geometric standard deviation of MMAD: GSD=8.08
Fractional deposition in human respiratory tract (MPPD model, based on calculated MMAD):
Head (ET): 35.0%
Tracheobronchial (TB): 0.3%
Pulmonary (PU): 0.7%
Particle size analysis by laser diffraction
d50 = 1.4 µm
d90 = 2.8 µm
d10 = 0.7 µm
(All values were calculated assuming that the particles are spherical)
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