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URANIUM HEXAFLUORIDE ICSC: 1250
Date of Peer Review: March 1995

Uranium fluoride
CAS # 7783-81-5 UF6
RTECS # YR4720000 Molecular mass: 352.0
UN # 2978
EC # 092-002-00-3
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.

In case of fire in the surroundings: powder, carbon dioxide. NO water.
EXPLOSION


EXPOSURE
AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Corrosive. Burning sensation. Cough. Shortness of breath.
Avoid inhalation of fine dust and mist. Closed system and ventilation.
Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.
Skin Corrosive. Skin burns. Pain.
Protective gloves. Protective clothing.
First rinse with plenty of water, then remove contaminated clothes and rinse again. Refer for medical attention. Wear protective gloves when administering first aid.
Eyes Corrosive. Pain. Severe deep burns.
Face shield 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 Corrosive. Abdominal cramps. Burning sensation. Shock or collapse.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Sweep spilled substance into sealable containers, then remove to safe place. Personal protection: complete protective clothing including self-contained breathing apparatus.
Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
EU Classification
Symbol: T+, N
R: 26/28-33-51/53
S: (1/2-)-20/21-45-61
Note: [A]
UN Classification
UN Hazard Class: 7
UN Subsidiary Risks: 8

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-70Gd
Separated from aromatic compounds, ethanol, food and feedstuffs. Dry. Well closed. Keep in a well-ventilated room.
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 HEXAFLUORIDE ICSC: 1250
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS TO WHITE DELIQUESCENT CRYSTALS.

CHEMICAL DANGERS:
The substance decomposes on heating producing toxic fumes of hydrogen fluoride (see ICSC 0283). Reacts with aromatic compounds, such as benzene, toluene and xylene. Reacts violently with water and ethanol. Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC 0001). Attacks plastic, rubber and coatings.

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 and by ingestion.

INHALATION RISK:
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
Corrosive. The substance is corrosive to the eyes, the skin and the respiratory tract. The substance may cause effects on the kidneys, resulting in kidney impairment and tissue lesions. Exposure at low level may result in death.

PHYSICAL PROPERTIES
Boiling point: 56C
Relative density (water = 1): 5.09
Solubility in water, g/100 ml at 20C: reaction
Vapour pressure, kPa at 20C: 14.2
ENVIRONMENTAL DATA

NOTES
Do NOT take working clothes home. Shipping name: UN 2978: Uranium hexafluoride (low specific activity); UN 2977: Uranium hexafluoride, fissile (containing more than 1% (235) uranium).
Card has been partly updated in April 2005. See sections Occupational Exposure Limits, Emergency Response.
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