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EC number: 231-143-9
CAS number: 7440-33-7
Tungsten metal powder is only classified under CLP for flammability and self-heating. The substance of the particle size tested (0.6-0.9 µm), classifies as a self-heating, Category 2 substance under CLP. The flammability of tungsten powder is dependent on its particle size (Fisher Sub Sieve particle size):
Those tungsten powders with particle size equal or less than a Fisher Size of 4.35 microns in general had a burning time less than 300 seconds (5 minutes) are considered flammable powders Category 1 (Packing Group II).
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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