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THORIUMICSC: 0337
November 2010
CAS #: 7440-29-1
UN #: 2912
EC Number: 231-139-7

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Highly flammable if powdered.  Finely dispersed particles form explosive mixtures in air.  NO open flames, NO sparks and NO smoking. NO contact with hot surfaces.  Do NOT expose to friction or shock. Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust.  Use special powder, dry sand. NO other agents.  In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water. 

 PREVENT DISPERSION OF DUST! AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. See Notes.  Use closed system and ventilation.  Fresh air, rest. 
Skin   Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Use radiation detector to ensure no remaining contamination. 
Eyes Redness.  Wear face shield or eye protection in combination with breathing protection.  Rinse with plenty of water for several minutes (remove contact lenses if easily possible). 
Ingestion   Do not eat, drink, or smoke during work.  Rinse mouth. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Sweep spilled substance into covered containers. Carefully collect remainder. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

flam;flamecancer;health haz
DANGER
Catches fire spontaneously if exposed to air
May cause cancer
Causes damage to lungs if inhaled
Causes damage to the respiratory tract through prolonged or repeated exposure if inhaled 

Transportation
UN Classification
UN Hazard Class: 7 

STORAGE
Fireproof. Separated from strong oxidants. Cool. Well closed. Keep in a well-ventilated room. 
PACKAGING
Unbreakable packaging.
Put breakable packaging into closed unbreakable container. 
THORIUM ICSC: 0337
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
GREY-WHITE METAL POWDER 

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air. If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc. 

Chemical dangers
The substance may ignite spontaneously on contact with air. May decompose explosively on shock, friction or concussion. Reacts violently with strong oxidants. Reacts with halogens, hydrogen and sulfur. 

Formula: Th
Atomic mass: 232.0
Boiling point: 4788°C
Melting point: 1750°C
Relative density (water = 1): 11.7
Solubility in water at none°C: none
Auto-ignition temperature: 270°C  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation. 

Effects of short-term exposure
May cause mechanical irritation to the eyes. Inhalation of the aerosol may cause damage to the lungs. 

Inhalation risk
A nuisance-causing concentration of airborne particles can be reached quickly when dispersed. 

Effects of long-term or repeated exposure
Repeated or prolonged inhalation of the aerosol may cause effects on the lungs. This substance is carcinogenic to humans. 


OCCUPATIONAL EXPOSURE LIMITS
 

ENVIRONMENT
 

NOTES
Depending on degree of exposure, estimation of dose received may be required by whole body counting techniques.
Depending on the degree of exposure, periodic medical examination is suggested.
This material and its decay products are radioactive.
Storage in a poorly ventilated area may result in a buildup of gaseous radioactive decay products.
Prolonged retention in the body leads to long term alpha-irradiation of the tissues.
Refer for medical attention if breathing difficulties and/or fever develop.
Do NOT take working clothes home. 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations