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EC number: 215-157-2
CAS number: 1308-06-1
Dustiness (airborne fraction): total: 71.18
In the original study report by DMT, a
calculation of the mass median diameter was not conducted. Since the
deposited fractions were provided for each of the cascade impactor
stages, it was possible to fit a mono modal lognormal distribution to
the data by standard non-linear regression procedure. As a result, the
MMAD and GSD are calculable and reported (MMAD = 18.23 µm, GSD = 4.03).
As the cascade impactor already takes aerodynamic characteristics of the
particles into account, the reported mass median diameter can be
interpreted as the mass median aerodynamic diameter.
This figure and the corresponding GSD were
used as distribution parameters for the MPPD model enabling an
estimation of deposited dust fractions in the human respiratory tract:
These fractions were estimated as follows:
Head (ET): 49.1%
Tracheobronchial (TB): 1.1%
Pulmonary (PU): 1.7%
Paricle size distribution (OECD 110):
The median particle size L50 is 5.6µm.
Total Dustiness (airborne fraction): 71.18
Mass median aerodynamic diameter of airborne
fraction: MMAD = 18.23.
Geometric standard deviation of MMAD: GSD =
Fractional deposition in human respiratory
tract (MPPD model, based on calculated MMAD):
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