Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.
In case of fire in the surroundings: all extinguishing agents allowed.
Avoid inhalation of fine dust and mist. Use local exhaust or breathing protection.
Fresh air, rest.
Rinse skin with plenty of water or shower.
Wear safety spectacles.
Rinse with plenty of water (remove contact lenses if easily possible).
Do not eat, drink, or smoke during work.
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
Separated from acids.
PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance WHITE POWDER.
Chemical dangers Decomposes on heating. This produces irritating fumes. Reacts with acids. This produces carbon dioxide gas.
Molecular mass: 84.3
Decomposes at 350°C Relative density (water = 1): 2.95 Solubility in water, g/100ml at 20°C: 0.01 (very poor)
EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation.
Effects of short-term exposure
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
Magnesite (CAS 7760-50-1) is naturally occuring magnesium carbonate mineral. Magnesite can contain crystalline silica, see ICSC 0808.
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