Registration Dossier
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 231-867-5 | CAS number: 7772-98-7
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
Description of key information
The particle size of a representative sodium thiosulfate anhydrous sample was determined to be:
D50 = 750.7 µm
D10 = 170.9 µm
D90 = 1453.9 µm
Dustiness 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.
Additional information
The particle size distribution of the test item was determined by laser diffraction (light scattering) according to OECD guideline 110.
The 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.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
Route: .live1