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EC number: 231-176-9
CAS number: 7440-67-7
Particle size distribution have been determined for zirconium powder by laser diffraction following OECD 110 ( Particle Size Distribution)The median particle size D50 of the test items deduced from the particle size distributions is 76.42 µm.The particle size D10 of the test items deduced from the particle size distributions is 32.64 µm.The particle size D90 of the test items deduced from the particle size distributions is 141.11 µm.
Based on column 2 of the REACH regulation on standard
information requirements (Annex VII, section 7.14), it is not
necessary to conduct a study if the substance is marketed or used in a
non solid or non granular form. Therefore there is no need to
perform this test on Zr for the shot or sponge forms. However,
it is relevant to perform this test on Zr powder form.
Furthermore, OCDE Test Guidance N° 110 : Particle Size Distribution/
Fibre Length and Diameter Distributions, can be performed for a three
size ranges : > 200μm, < 2 μm and between 2 and 200μm. Zirconium shot
sizes are > 5 mm, therefore this test is technically impossible and
shall only be conducted on the powder form according to the EEC method
Particle size distribution on powder form have been determined by by
laser diffraction according to the European Commission Regulation (EC)
No. 440/2008 and under consideration of the following guidelines:
OECD 110 (1981): Particle Size Distribution,
CIPAC MT 187: Particle Size Analysis by Laser Diffraction
ISO13320-1: Particle Size Analysis - Laser Diffraction Methods
The median particle size D50 of the test items deduced from the particle
size distributions is 76.42 µm.
The particle size D10 of the test items deduced from the particle size
distributions is 32.64 µm.
The particle size D90 of the test items deduced from the particle size
distributions is 141.11 µm.
It should be noted that zirconium can have many particle size
distributions depending on the manufacturing process and intended uses.
It is therefore not possible to conclude a representative d50 and the
value obtained should be individually considered representative.
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.
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