ICSC 1217 - PLASTER OF PARIS

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PLASTER OF PARIS	ICSC: 1217 (October 2004)
Gypsum hemihydrate

CAS #: 26499-65-0

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Not combustible.		In case of fire in the surroundings, use appropriate extinguishing media.


	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough.	Use local exhaust or breathing protection.	Fresh air, rest.
Skin		Protective gloves.	Rinse and then wash skin with water and soap.
Eyes	Redness. Pain.	Wear safety spectacles.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
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 Transportation UN Classification
STORAGE
Dry. Well closed.
PACKAGING

PLASTER OF PARIS

ICSC: 1217

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance FINE HYGROSCOPIC WHITE POWDER. Physical dangers Chemical dangers	Formula: (CaSO₄)₂.H₂O 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

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
FINE HYGROSCOPIC WHITE POWDER.

Physical dangers

Chemical dangers

Formula: (CaSO₄)₂.H₂O
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

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
TLV: (inhalable fraction): 10 mg/m³, as TWA. MAK: (inhalable fraction): 4 mg/m³; pregnancy risk group: C. MAK: (respirable fraction): 1.5 mg/m³; pregnancy risk group: C

ENVIRONMENT

NOTES
The apparent melting point caused by loss of crystal water is given. Melting point for the anhydrous form is 1450°C. Other CAS number: 10034-76-1 .

ADDITIONAL INFORMATION

EC Classification

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