INTOX Home Page
URANIUM DIOXIDE ICSC: 1251
Date of Peer Review: March 1995

Uranous oxide
Black uranium oxide
CAS # 1344-57-6 UO2
RTECS # YR4705000 Molecular mass: 270.0
UN #
EC # 092-002-00-3
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible.
NO open flames.
Water spray, powder.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE!
IN ALL CASES CONSULT A DOCTOR!
Inhalation
Avoid inhalation of fine dust and mist. 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.
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 take to a doctor.
Ingestion
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
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.
EU Classification
Symbol: T+, N
R: 26/28-33-51/53
S: (1/2-)-20/21-45-61
Note: [A]
UN Classification

EMERGENCY RESPONSE SAFE STORAGE

Well closed.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2004

SEE IMPORTANT INFORMATION ON BACK


URANIUM DIOXIDE ICSC: 1251
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
BLACK TO BROWN CRYSTALS OR BLACK TO BROWN POWDER.

CHEMICAL DANGERS:
The substance may spontaneously ignite on contact with air when heated above 700C.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as U) 0.2 mg/m as TWA; 0.6 mg/m 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 20C 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:
Lungs may be affected by repeated or prolonged exposure to dust particles.
PHYSICAL PROPERTIES
Melting point: 2865C
Relative density (water = 1): 11.0
Solubility in water: none
ENVIRONMENTAL DATA

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


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2004