Combustible under specific conditions. Finely dispersed particles form explosive mixtures in air. Risk of fire and explosion on contact with halogens or oxidizing agents.
NO open flames. Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust. Prevent build-up of electrostatic charges (e.g., by grounding).
Use special powder, dry sand. NO hydrous agents.
Use local exhaust or breathing protection.
Fresh air, rest.
Rinse skin with plenty of water or shower.
Wear safety goggles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Do not eat, drink, or smoke during work.
CLASSIFICATION & LABELLING
Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting.
According to UN GHS Criteria
Transportation UN Classification
UN Hazard Class: 4.1; UN Pack Group: III
Separated from incompatible materials. See Chemical Dangers.
PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance STEEL-GREY CRYSTALS OR BLACK-TO-BROWN AMORPHOUS POWDER.
Physical dangers Dust explosion possible if in powder or granular form, mixed with air. If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc.
Chemical dangers Reacts violently with oxidants, halogens, metal carbonates and metal acetylides. This generates fire hazard. Reacts violently with metal hexafluorides. This generates fire and explosion hazard. Reacts on heating with water. This produces flammable/explosive gas (hydrogen - see ICSC 0001).
Atomic mass: 28.09
Boiling point: 2355°C Melting point: 1410°C Density: 2.33 g/cm³ Solubility in water: none
EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation.
Effects of short-term exposure May cause mechanical irritation to the eyes and respiratory tract.
Inhalation risk A nuisance-causing concentration of airborne particles can be reached quickly when dispersed.
Effects of long-term or repeated exposure
OCCUPATIONAL EXPOSURE LIMITS
Reacts violently with fire extinguishing agents such as water.
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