IPCS INCHEM Home
ZIRCONIUMICSC: 1405
October 2004
CAS #: 7440-67-7(unstable powder)
UN #: 2008
EINECS #: 231-176-9

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. Many reactions may cause fire or explosion.  Finely dispersed particles form explosive mixtures in air.  NO open flames.  Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust.  Use dry sand, dry powder.   

See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE. PREVENT DISPERSION OF DUST!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation   Use local exhaust or breathing protection.  Fresh air, rest. 
Skin   Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.  Rinse mouth. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 4.2; UN Pack Group: I 

STORAGE
See Chemical Dangers. 
PACKAGING
 
ZIRCONIUM ICSC: 1405
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
HARD LUSTROUS GREYISH-WHITE FLAKES OR GREY AMORPHOUS POWDER. 

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air. 

Chemical dangers
Reacts violently with borax and carbon tetrachloride when heated. Reacts explosively with alkali metal hydroxides when heated. 

Formula: Zr
Atomic mass: 91.2
Boiling point: 3577°C
Melting point: 1857°C
Relative density (water = 1): 6.5
Solubility in water: none 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
 

Effects of short-term exposure
May cause mechanical irritation to the eyes. 

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed. 

Effects of long-term or repeated exposure
Repeated or prolonged inhalation of dust particles may cause effects on the lungs. 


Occupational exposure limits
TLV: 5 mg/m3, - ppm, as TWA; 10 mg/m3 as STEL; A4 (not classifiable as a human carcinogen).
MAK: (as Zr): 1 (inhalable) mg/m3; peak limitation category: I(1); sensitization of respiratory tract and skin (SAH); pregnancy risk group: D 

ENVIRONMENT
 

NOTES
Other UN numbers: 1358 Zirconium powder; wetted; hazard class 4.1, packaging group II; 1932 Zirconium scrap, hazard class 4.2, packaging group III; 2009 Zirconium, dry, finished metal sheets, wire, strip, hazard class 4.2, packaging group III;
Pure Zirconium sponge is pyrophoric and violently explosive when impure. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F; R: 15-17; S: (2)-7/8-43 

All rights reserved. The published material is being distributed without warranty of any kind, either expressed or implied. Neither ILO nor WHO nor the European Commission shall be responsible for the interpretation and use of the information contained in this material.
    See Also:
       Toxicological Abbreviations