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EC number: 229-355-1
CAS number: 6486-23-3
The cleaned, almost particle-free air had a total particle count of 5
particles/cm³ in the range of 10 nm – 417 nm, whereby the nanoscale
fraction (10 - 100 nm) contained 3 particles/cm³.
Summary SMPS result:
[ particles /cm³]
100 - 417
Summary OPS result:
0.3 - 10
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
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:
Continuous 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 clean,
almost particle-free air.
The SMPS counted 15910.3 particles in the nanoscale (10 - 100 nm) per
cm³, corresponding to a dustiness index of 46281.3 particles in the
nanoscale (10 - 100 nm) per mg. The particle number in the whole SMPS
size range (10-417 nm) was 18422.4 per cm³, corresponding to a dustiness
index of 53588.7 particles/mg (size 10 - 417 nm).
The mean size of the nanoparticles was 47.0 nm, the mean size of
particles in the range 10 - 417 nm was 62.4.
The OPS (0.3 - 10 µm) counted 337.9 particles per cm³ corresponding to a
dustiness index of 982.8 particles per mg. The mean size of the
particles was 1.6 µm.
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