ICSC 1251 - URANIUM DIOXIDE(OBSOLETE)

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URANIUM DIOXIDE (OBSOLETE)	ICSC: 1251 (March 1995)
Uranous oxide Black uranium oxide Uranium oxide (UO2) Urania Brown oxide Uranium(IV) oxide

CAS #: 1344-57-6

EC Number: 215-700-3

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Combustible if powdered.	NO open flames, NO sparks and NO smoking.	Use water spray, powder.

PREVENT DISPERSION OF DUST! STRICT HYGIENE! IN ALL CASES CONSULT A DOCTOR!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough.	Avoid inhalation of dust. Use ventilation (not if powder), local exhaust or breathing protection.	Fresh air, rest.
Skin		Protective gloves.	Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes	Redness. Pain.	Wear safety goggles or eye protection in combination with breathing protection if powder.	Rinse with plenty of water (remove contact lenses if easily possible).
Ingestion		Do not eat, drink, or smoke during work.	Rinse mouth.

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Evacuate danger area! 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 DANGER Very toxic to aquatic life Toxic to aquatic life with long lasting effects May cause damage to organs through prolonged or repeated exposure Transportation UN Classification
STORAGE
Well closed. Store only in original container. Cool.
PACKAGING

URANIUM DIOXIDE (OBSOLETE)

ICSC: 1251

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance BLACK-TO-BROWN CRYSTALS OR 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: 2847°C Relative density (water = 1): 11.0 Solubility in water: none

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
BLACK-TO-BROWN CRYSTALS OR 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: 2847°C
Relative density (water = 1): 11.0
Solubility in water: none

EXPOSURE & HEALTH EFFECTS
Routes of exposure Exposure mainly occurs via inhalation. Effects of short-term exposure The substance is irritating to the eyes.	Inhalation risk A harmful concentration of airborne particles can be reached quickly 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.

EXPOSURE & HEALTH EFFECTS

Routes of exposure
Exposure mainly occurs via inhalation.

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

Inhalation risk
A harmful concentration of airborne particles can be reached quickly 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
TLV: (as U): 0.2 mg/m³, as TWA; 0.6 mg/m³ as STEL; A1 (confirmed human carcinogen); BEI issued

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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