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MAGNESIUM (POWDER)ICSC: 0289
June 2011
CAS #: 7439-95-4
UN #: 1418
EINECS #: 231-104-6

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.  Finely dispersed particles form explosive mixtures in air.  NO open flames, NO sparks and NO smoking. NO contact with moisture or any other substances.  PREVENT DISPERSION OF DUST. Closed system, dust explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding).  Use dry sand, special powder. NO water. NO other agents. See Notes.   

   
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Sore throat. Shortness of breath.  Use local exhaust or breathing protection.  Fresh air, rest. 
Skin Redness.  Protective gloves.  Remove contaminated clothes. Rinse skin with plenty of water or shower. 
Eyes Redness. Pain.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Burning sensation in the mouth.  Do not eat, drink, or smoke during work.  Rinse mouth. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Remove all ignition sources. Consult an expert! Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered dry containers. Carefully collect remainder. Then store and dispose of according to local regulations. Do NOT wash away into sewer. 

According to UN GHS Criteria

flam;flame
DANGER
In contact with water releases flammable gases
Catches fire spontaneously if exposed to air 

Transportation
UN Classification
UN Hazard Class: 4.3; UN Subsidiary Risks: 4.2; UN Pack Group: I, II, III 

STORAGE
Fireproof. Dry. Well closed. Separated from other incompatible materials. 
PACKAGING
Airtight. 
MAGNESIUM (POWDER) ICSC: 0289
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
GREY 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 and moisture. This produces irritating or toxic fumes. Reacts with oxidants and many other substances. Reacts with moisture and acids. This produces flammable/explosive gas (hydrogen - see ICSC 0001). This generates fire and explosion hazard. 

Formula: Mg
Atomic mass: 24.3
Boiling point: 1100°C
Melting point: 649°C
Density: 1.7 g/cm³
Solubility in water: reaction
Auto-ignition temperature: 473 °C
Explosive limits, vol% in air: see Notes 


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating to the eyes and respiratory tract. 

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
 

ENVIRONMENT
 

NOTES
Burns with an intense flame.
In order to prevent eye injury do not look directly at magnesium fires.
Explosive limits, vol% in air: (LEL) 0.03 kg/m³.
See ICSC 0701.
Reacts violently with fire extinguishing agents such as water, carbon dioxide, halons, powder and foam. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F; R: 15-17; S: (2)-7/8-43 

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       Toxicological Abbreviations