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EC number: 226-789-3
CAS number: 5468-75-7
measurement duration: 10 min
temperature: 27°C, rel. air humidity 51 %
The cleaned, almost particle-free air had a
total particle count of 7 particles/cm3 in the range of 10 nm
- 417 nm, the nanoscale fraction (10 - 100 nm) contained 4 particles/cm3.
table 1: summary SMPS (sanning mobility
ECD[1/mg x s]
10 - 100
100 - 417
10 - 417
ICD: dustiness index as number of
airborne particles per mg
ECD: emission rate as number of
particles per mg per second
mean: average particle diameter in nm
N: number of airborne particles
table 2: summary OPS (optical particle
0.3 - 10
The dusting behaviour of the test material
was investigated using DIN EN 17199 -3: 2019 -12 "workplace exposure -
measurement of dustiness of bulk materials that contain or release
respirable nano objects and their aggregates and agglomerates or other
respirable particles- Part 3: Copntinuous drop method".
The dust released by the falling test
material was measured by a scanning mobility particle sizer (SMPS, 10 -
417 nm) and an optical particle sizer (3 - 10 µm). The counterflow was
provided by cleaned, almost particle-free air.
The SMPS counted 51643.7 particles per cm3
(in the nanoscale (10 - 100 m) 18861.5 particles per cm3)
corresponding to a dustiness index of 152146.5 particles per mg (in the
nanoscale (10 - 100 nm) 55567.5 particles per mg). The mean size of the
nanoparticles was 52.4 nm, the mean size of particles in the range 10 -
417 nm was 169.0 nm.
The OPS (0.3 - 10 µm) counted 1334.6
particles per cm3 corresponding to a dustiness index of 3931.9
particles per mg. The mean size of the particles was 4.9 µm.
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