ICSC 1250 - URANIUM HEXAFLUORIDE

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

URANIUM HEXAFLUORIDE

ICSC: 1250
_{March 1995}

Uranium fluoride

CAS No: 7783-81-5
RTECS No: YR4720000
UN No: 2978
EC No: 092-002-00-3

UF₆
Molecular mass: 352.0

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.	T+ Symbol N Symbol R: 26/28-33-51/53 S: (1/2-)20/21-45-61 Note: A UN Hazard Class: 7 UN Subsidiary Risks: 8	Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.

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.

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/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 and by ingestion.

Inhalation risk
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C.

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

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.

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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