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EC number: 231-867-5
CAS number: 7772-98-7
The particle size of a representative sodium thiosulfate anhydrous sample was determined to be:D50 = 750.7 µmD10 = 170.9 µmD90 = 1453.9 µmDustiness and MMAD (GSD) of airborne material: Dustiness: 23.78 mg/g, MMAD (GSD): 28.16 µm (1.89)For more details see discussion and technical dossier.
particle size distribution of the test item was determined by laser
diffraction (light scattering) according to OECD guideline 110.
test item was tested as received and was analysed with the
Master-Sizer 2000 (Version 5.12G) of Malvern Instruments with a dry
powder feeder; measuring range was 0.02 to 2000 µm.
In addition to the physical particle size,
the dustiness, i.e. the tendency of the materials to become airborne,
has been determined with a representative sample using the modified
Heubach method (in accordance withDIN 55992
-1:2006, Determination of a parameter for the dust formation of pigments
and extenders – Part 1: Rotation method). In this modified method - in
addition to the dustiness - the mass median aerodynamic diameter of the
airborne particles has been determined using cascade impactor data.
Further, the Multiple-Path Particle
Dosimetry Model (MPPD, v2.0; CIIT, 2006) was used to predict fractional
deposition behaviour of these particles in the human respiratory tract.
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