ICSC 1251 - URANIUM DIOXIDE

[List of Chemicals] [Risk Notes] [Risk Phrases] [Safety Phrases] [Danger Symbols]

URANIUM DIOXIDE

ICSC: 1251
_{March 1995}

Uranous oxide
Black uranium oxide

CAS No: 1344-57-6
RTECS No: YR4705000
EC No: 092-002-00-3

UO₂
Molecular mass: 270.0

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.	T+ Symbol N Symbol R: 26/28-33-51/53 S: (1/2-)20/21-45-61 Note: A

EMERGENCY RESPONSE	SAFE STORAGE
	Well closed.

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/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
Lungs may be affected by repeated or prolonged exposure to dust particles.

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.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004

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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.

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