Registration Dossier
Registration Dossier
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EC number: 231-146-5 | CAS number: 7440-36-0
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
Description of key information
Sample 1:
D10 = 2.74µm
D50 = 10.43µm
D90 = 36.65µm.
MMAD = 19.05 µm (airborne fraction), GSD = 2.75
Sample 2:
D10 = 2.42µm
D50 = 12.44µm
D90 = 51.53µm
MMAD = 27.93 µm (airborne fraction), GSD = 2.23
Additional information
Sample 1:
The median particle size D50 of the test item deduced from the particle size distributions is 10.43µm.
The particle size D10 of the test item deduced from the particle size distributions is 2.74µm.
The particle size D90 of the test item deduced from the particle size distributions is 36.65µm.
Total Dustiness (airborne fraction): 41.08 mg/g with a mass median aerodynamic diameter of airborne fraction: MMAD = 19.05 µm (cascade impactor), geometric standard deviation of MMAD: GSD = 2.75
Fractional deposition in human respiratory tract (MPPD model, based on calculated MMAD):
Head (ET): 56.5%
Tracheobronchial (TB): 0.7%
Pulmonary (PU): 0.9%
Sample 2:
The median particle size D50 of the test item deduced from the particle size distributions is 12.44µm.
The particle size D10 of the test item deduced from the particle size distributions is 2.42µm.
The particle size D90 of the test item deduced from the particle size distributions is 51.53µm.
Total Dustiness (airborne fraction): 603.72 mg/g(experimental results, DMT Report).
Mass median aerodynamic diamater of airborne fraction: MMAD = 27.93 µm (distribution fitted to cascade impactor data).
Geometric standard deviation of MMAD: GSD = 2.23
Fractional deposition in human respiratory tract (MPPD model, based on calculated MMAD):
Head (ET): 48.9%
Tracheobronchial (TB): 0.2%
Pulmonary (PU): 0.3%
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