Registration Dossier
Registration Dossier
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EC number: 269-057-9 | CAS number: 68186-95-8 An inorganic pigment that is the reaction product of high temperature calcination in which zirconium (IV) oxide, silicon oxide, and vanadium (IV) oxide in varying amounts are homogeneously and ionically interdiffused to form a crystalline matrix of zircon. Its composition may include any one or a combination of the modifiers alkali or alkaline earth halides.
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
Description of key information
Zirconium vanadium blue zircon: MMAD1=16.77µm, P1=0.17 ; MMAD2=32.94µm, P2=0.83; GSD1=1.10, GSD2=3.40
Zirconium vanadium blue zircon: D50 = 10.1 µm
Additional information
Total Dustiness (airborne fraction): 366.24mg/g (experimental results, DMT Report).
Mass median aerodynamic diamater of airborne fraction: MMAD1=16.77µm, P1=0.17 ; MMAD2=32.94µm, P2=0.83 (distribution fitted to cascade impactor data). Geometric standard deviation of MMAD1: GSD1=1.10, of MMAD2: GSD2=3.40
Fractional deposition in human respiratory tract (MPPD model, based on calculated MMAD):
Head (ET): 51.4%
Tracheobronchial (TB): 0.3%
Pulmonary (PU): 0.6%
Particle size analysis by laser diffraction:
d50 = 10.1 µm
d90 = 18.4 µm
d10 = 5.3 µm (All values were calculated assuming that the particles are spherical)
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