Uranous oxide
Black uranium oxide
UO2
Molecular mass: 270.0
ICSC # 1251
CAS # 1344-57-6
RTECS # YR4705000
EC # 092-002-00-3
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
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NO open flames.
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Water spray, powder.
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Explosion
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Exposure
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PREVENT DISPERSION OF DUST!
STRICT HYGIENE!
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IN ALL CASES CONSULT A DOCTOR!
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•Inhalation
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Avoid inhalation of fine dust and mist.
Ventilation (not if powder), local exhaust, or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Protective gloves.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
Refer for medical attention.
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•Eyes
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Redness.
Pain.
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Safety goggles
or
eye protection in combination with breathing protection if powder.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Do not eat, drink, or smoke during work.
Wash hands before eating.
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Rinse mouth.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting.
Then remove to safe place.
Personal protection: P3 filter respirator for toxic particles.
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Well closed.
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Note: A
T+ symbol
N symbol
R: 26/28-33-51/53
S: 1/2-20/21-45-61
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Important Data
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Physical State; Appearance:
BLACK
TO BROWN
CRYSTALS
OR
BLACK
TO BROWN
POWDER
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Physical Dangers:
Chemical Dangers:
The substance may spontaneously ignite 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).
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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
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Effects of Long-Term or Repeated Exposure:
Lungs may be affected by repeated or prolonged exposure to dust particles.
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Physical
Properties
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Melting point: 2865°C
Relative density (water = 1): 11.0
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Solubility in water:
none
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Environmental
Data
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N O T E S
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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.
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ADDITIONAL INFORMATION
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ICSC: 1251
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URANIUM DIOXIDE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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