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MAGNESIUM OXIDEICSC: 0504
May 2010
CAS #: 1309-48-4Calcined brucite
Calcined magnesia
Magnesia
EINECS #: 215-171-9

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible.    NO contact with strong acids.    In case of fire in the surroundings: all extinguishing agents allowed.   

 PREVENT DISPERSION OF DUST!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough.  Use 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.  Wear safety goggles or eye protection in combination with breathing protection.  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. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. 

According to UN GHS Criteria

No hazard classification according to GHS criteria 

Transportation
UN Classification
 

STORAGE
Separated from strong acids. Dry. Well closed. 
PACKAGING
 
MAGNESIUM OXIDE ICSC: 0504
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
HYGROSCOPIC FINE WHITE POWDER. 

Physical dangers
No data. 

Chemical dangers
Reacts violently with strong acids. 

Formula: MgO
Molecular mass: 40.3
Boiling point: 3600°C
Melting point: 2800°C
Relative density (water = 1): 3.6
Solubility in water: poor 


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
May cause mechanical irritation. 

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

Effects of long-term or repeated exposure
Lungs may be affected by repeated or prolongated exposure to dust particles. 


Occupational exposure limits
TLV: (inhalable fraction): 10 mg/m3, ppm, as TWA; A4 (not classifiable as a human carcinogen).
MAK: (inhalable fraction): 4 mg/m3; pregnancy risk group: C; (respirable fraction): 1.5 mg/m3; pregnancy risk group: C 

ENVIRONMENT
 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations
       MAGNESIUM OXIDE (JECFA Evaluation)