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THORIUM
ICSC: 0337
Peer-Review Status: 12.11.2010 Validated
 
CAS #: 7440-29-1 RTECS #: XO6400000
UN #: 2912
EINECS #: 231-139-7
    Formula: Th
Atomic mass: 232.0

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Highly flammable if powdered.  NO open flames, NO sparks and NO smoking. NO contact with hot surfaces.  Use special powder, dry sand. NO other agents. 
EXPLOSION Finely dispersed particles form explosive mixtures in air.  Do NOT expose to friction or shock. Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent deposition of dust.  In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water. 
 
EXPOSURE   PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!  IN ALL CASES CONSULT A DOCTOR! 
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
PACKAGING & 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.  Unbreakable packaging.
Put breakable packaging into closed unbreakable container. 
EC Classification
 
UN Classification
UN Hazard Class: 7 
GHS Classification
Signal: 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 
flam;flamecancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
  Fireproof. Separated from strong oxidants. Cool. Well closed. Keep in a well-ventilated room. 

IMPORTANT DATA
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. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):.
MAK (not established):. 

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

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

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

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. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
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  
 

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
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE 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.


    See Also:
       Toxicological Abbreviations