Gypsum
Synonyms & Trade Names
Calcium(II) sulfate dihydrate, Gypsum stone, Hydrated calcium sulfate, Mineral white [Note: Gypsum is the dihydrate form of calcium sulfate; Plaster of Paris is the hemihydrate form.]Exposure Limits
NIOSH REL
TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)OSHA PEL
TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)Physical Description
White or nearly white, odorless, crystalline solid.Molecular Weight
172.2Boiling Point
?Melting Point
262-325°F (Loses H2O)Solubility
(77°F): 0.2%Vapor Pressure
0 mmHg (approx)Ionization Potential
NASpecific Gravity
2.32Flash Point
NAUpper Exposive Limit
NALower Explosive Limit
NA
Noncombustible Solid
Incompatibilities & Reactivities
Aluminum (at high temperatures), diazomethaneExposure Routes
inhalation, skin and/or eye contactSymptoms
irritation eyes, skin, mucous membrane, upper respiratory system; cough, sneezing, rhinorrhea (discharge of thin nasal mucus)Target Organs
Eyes, skin, respiratory systemPersonal Protection/Sanitation
(See protection codes)Skin:No recommendation
Eyes:No recommendation
Wash skin:No recommendation
Remove:No recommendation
Change:No recommendation
Respirator Recommendations
Not available.
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division