URANIUM DIOXIDE (ICSC)

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 Š 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 700°C.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as U) 0.2 mg/mł as TWA; 0.6 mg/mł 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:
Lungs may be affected by repeated or prolonged exposure to dust particles.

PHYSICAL PROPERTIES

Melting point: 2865°C
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

Š IPCS, CEC 2004

    See Also:
       Toxicological Abbreviations