In case of fire in the surroundings, use appropriate extinguishing media.
Use local exhaust or breathing protection.
Fresh air, rest.
Rinse and then wash skin with water and soap.
Wear safety spectacles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
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
Transportation UN Classification
Dry. Well closed.
PLASTER OF PARIS
PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance FINE HYGROSCOPIC WHITE POWDER.
Molecular mass: 290.3
Melting point: 163°C Density (for the alpha hemihydrate): 2.76 g/cm³ Density (for the beta hemihydrate): 2.63 g/cm³ Solubility in water, g/100ml at 25°C: 0.30
EXPOSURE & HEALTH EFFECTS
Routes of exposure
Effects of short-term exposure May cause mechanical irritation.
Inhalation risk A nuisance-causing concentration of airborne particles can be reached quickly when dispersed, especially if powdered.
Effects of long-term or repeated exposure
OCCUPATIONAL EXPOSURE LIMITS
Other CAS number is 10034-76-1. The apparent melting point caused by loss of crystal water is given. Melting point for the anhydrous form is 1450°C.
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