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URANIUM DIOXIDEICSC: 1251
March 1995
CAS #: 1344-57-6Uranous oxide
Black uranium oxide
EINECS #: 215-700-3

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.    NO open flames.    Use water spray, powder.   

 PREVENT DISPERSION OF DUST! STRICT HYGIENE! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS ACUTE HAZARDS FIRST AID
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 CLASSIFICATION & 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. 

According to UN GHS Criteria

 

Transportation
UN Classification
 

STORAGE
Well closed. 
PACKAGING
 
URANIUM DIOXIDE ICSC: 1251
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: UO2
Molecular mass: 270.0
Melting point: 2865°C
Relative density (water = 1): 11.0
Solubility in water: none 


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating to the eyes. 

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


Occupational exposure limits
 

ENVIRONMENT
 

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. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: T+, N; R: 26/28-33-51/53; S: (1/2)-20/21-45-61; Note: A 

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    See Also:
       Toxicological Abbreviations