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ZIRCONIUM
ICSC: 1405
Peer-Review Status: 27.10.2004 Validated
(unstable powder) 
CAS #: 7440-67-7 RTECS #: ZH7070000
UN #: 2008
EC #: 040-001-00-3
EINECS #: 231-176-9
    Formula: Zr
Atomic mass: 91.2

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible. Many reactions may cause fire or explosion.  NO open flames.  Use dry sand, dry powder. 
EXPLOSION Finely dispersed particles form explosive mixtures in air.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent deposition of dust.   
 
EXPOSURE See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE.  PREVENT DISPERSION OF DUST!   
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
PACKAGING & 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.   
EC Classification
Symbol: F; R: 15-17; S: (2)-7/8-43 
UN Classification
UN Hazard Class: 4.2; UN Pack Group: I 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-42GS4-I+II+III.  See Chemical Dangers. 

IMPORTANT DATA
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. 

Occupational exposure limits
TLV: 5 mg/m³ as TWA; 10 mg/m³ as STEL; A4 (not classifiable as a human carcinogen); (ACGIH 2008).
MAK (inhalable fraction): 1 mg/m³; Peak limitation category: I(1); Pregnancy risk group: D; Sensitization of respiratory tract and skin (SAH); (DFG 2008). 

Routes of exposure
 

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

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

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


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 3577°C
Melting point: 1857°C
Relative density (water = 1): 6.5
Solubility in water: none 
 

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.
Card has been partially updated in February 2009: see Occupational Exposure Limits. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations
       Zirconium (UKPID)