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HAFNIUM POWDER
(powder)
ICSC: 0847
Peer-Review Status: 05.05.2010 Validated
 
CAS #: 7440-58-6 RTECS #: MG4600000
UN #: 2545 (powder, dry)
EINECS #: 231-166-4
    Formula: Hf
Atomic mass: 178.5

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Flammable. See Chemical dangers  NO open flames, NO sparks and NO smoking.  Use special powder, dry sand, water in large amounts. 
EXPLOSION Finely dispersed particles form explosive mixtures in air. Risk of fire and explosion. See Chemical Dangers.  Do NOT expose to friction or shock. Prevent deposition of dust. Closed system, ventilation, explosion-proof electrical equipment and lighting.   
 
EXPOSURE   STRICT HYGIENE!   
Inhalation   Avoid inhalation of dust. Use closed system.  Fresh air, rest. 
Skin   Protective gloves.  Rinse contaminated clothes (fire hazard) with plenty of water. Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness.  Wear safety spectacles.  Rinse with plenty of water (remove contact lenses if easily possible). 
Ingestion   Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Remove all ignition sources. Evacuate danger area! Consult an expert! Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Wet powder to prevent dusting and ignition. Sweep spilled substance into covered water-filled containers. Then store and dispose of according to local regulations. Do NOT wash away into sewer. Do NOT absorb in saw-dust or other combustible absorbents.   
EC Classification
 
UN Classification
UN Hazard Class: 4.2; UN Pack Group: I 
GHS Classification
Signal: Danger
Catches fire spontaneously if exposed to air 
flam;flame

EMERGENCY RESPONSE SAFE STORAGE
  Fireproof. Separated from strong oxidants, strong acids and halogens. Keep under inert gas. Store only in original container. 

IMPORTANT DATA
Physical State; Appearance
GREY POWDER. 

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

Chemical dangers
The substance may ignite spontaneously on contact with air. May decompose on shock, friction or concussion. May explode on heating. Reacts violently with halogens, strong acids and strong oxidants. This generates explosion hazard. 

Occupational exposure limits
TLV: 0.5mg/m³ as TWA; (ACGIH 2010).
MAK (2b (not established but data is available)): (DFG 2009). 

Routes of exposure
 

Inhalation risk
 

Effects of short-term exposure
 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 4602°C
Melting point: 2227°C
Relative density (water = 1): 13.31
Solubility in water: none
Auto-ignition temperature: 20°C  
 

NOTES
Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken.
Powder is normally handled wetted with no less than 25% of water to reduce the fire and explosion risk. UN number 2545 is for dry powder, according to the specification of the powder Packing Group can be either I, II, or III. The GHS classification will also vary according to the specification of the powder. Other UN number is: 1326 HAFNIUM POWDER, WETTED with not less than 25% water; class 4.1; packing group: II. 

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