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MAGNESIUM OXIDE
ICSC: 0504
Peer-Review Status: 07.05.2010 Validated
Calcined brucite
Calcined magnesia
Magnesia 
CAS #: 1309-48-4 RTECS #: OM3850000
EINECS #: 215-171-9
 		    Formula: MgO
Molecular mass: 40.3

TYPES OF
HAZARD /
EXPOSURE 		ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Not combustible.  NO contact with strong acids.  In case of fire in the surroundings: all extinguishing agents allowed. 
EXPLOSION      
 
EXPOSURE   PREVENT DISPERSION OF DUST!   
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
 		PACKAGING & 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.   
EC Classification
 
UN Classification
 
GHS Classification
No hazard classification according to GHS criteria 

EMERGENCY RESPONSE SAFE STORAGE
  Separated from strong acids. Dry. Well closed. 

IMPORTANT DATA
Physical State; Appearance
HYGROSCOPIC FINE WHITE POWDER. 

Physical dangers
No data. 

Chemical dangers
Reacts violently with strong acids. 

Occupational exposure limits
TLV (inhalable fraction): 10mg/m³ as TWA; A4 (not classifiable as a human carcinogen); (ACGIH 2010).
MAK (as magnesium oxide fume : llb (not established but data is availabe)): (DFG 2009).
MAK (respirable fraction): 1.5 mg/m³; Pregnancy risk group: C; (DFG 2009).
MAK (inhalable fraction): 4 mg/m³; Pregnancy risk group: C; (DFG 2009). 

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

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

Effects of short-term exposure
May cause mechanical irritation. 

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


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 3600°C
Melting point: 2800°C
Relative density (water = 1): 3.6
Solubility in water: poor  		 

NOTES
 

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
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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
       MAGNESIUM OXIDE (JECFA Evaluation)