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EC number: 231-176-9
CAS number: 7440-67-7
Zirconium is an odourless metal, present in solid state at 20°C
and 101.3 kPa under different forms: powder, shot, sponge.
Zirconium is a bluish-black amorphous powder or grayish-white
lustrous metal (platelets or flakes) of hexagonal lattice below 865°C (
Physical and chemical properties of this substance are :
Particle size distribution for Zirconium powder: D50= 76.42 µm,
D10= 32.64 µm, D90= 141.11 µm.
Flammability properties of zirconium highly depend on the form and
particular size of the metal:
As stated in the harmonised Classification and Labelling (CLP
1272/2008, annex VI):
Zirconium powder is classified "pyr sol.1" and "water react 1"
Zirconium powder dry is classified "self heat 1"
A test conducted on Zirconium shot shows that it is highly
flammable according to dir 67/548/EEC.
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