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URANIUM DIOXIDE
ICSC: 1251
Peer-Review Status: 15.03.1995 Validated
Uranous oxide
Black uranium oxide 
CAS #: 1344-57-6 RTECS #: YR4705000
EC #: 092-002-00-3
EINECS #: 215-700-3
    Formula: UO2
Molecular mass: 270.0

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible.  NO open flames.  Use water spray, powder. 
EXPLOSION      
 
EXPOSURE   PREVENT DISPERSION OF DUST! STRICT HYGIENE!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation   Avoid inhalation of dust and mist. Use ventilation (not if powder), local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin   Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention . 
Eyes Redness. Pain.  Wear safety goggles or eye protection in combination with breathing protection if powder.  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. Wash hands before eating.  Rinse mouth. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into sealable containers. If appropriate, moisten first to prevent dusting. Then store and dispose of according to local regulations.   
EC Classification
Symbol: T+, N; R: 26/28-33-51/53; S: (1/2)-20/21-45-61; Note: A 
UN Classification
 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
  Well closed. 

IMPORTANT DATA
Physical State; Appearance
BLACK-TO-BROWN CRYSTALS OR BLACK-TO-BROWN POWDER. 

Physical dangers
No data. 

Chemical dangers
The substance may ignite spontaneously on contact with air when heated above 700°C. 

Occupational exposure limits
TLV (as U): 0.2 mg/m³ as TWA; 0.6 mg/m³ as STEL; A1 (confirmed human carcinogen); (ACGIH 2004). 

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying or when dispersed, especially if powdered. 

Effects of short-term exposure
The substance is irritating 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
Melting point: 2865°C
Relative density (water = 1): 11.0
Solubility in water: none 
 

NOTES
Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken.
Do NOT take working clothes home.
Card has been partly updated in April 2005.
See section 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