Calcium sulfate |
Synonyms & Trade Names Anhydrous calcium sulfate, Anhydrous gypsum, Anhydrous sulfate of lime, Calcium salt of sulfuric acid [Note: Gypsum is the dihydrate form and Plaster of Paris is the hemihydrate form.] |
CAS No. 7778-18-9 |
RTECS No. WS6920000 |
DOT ID & Guide |
FormulaCaSO4 |
Conversion |
IDLH N.D.
See: IDLH INDEX |
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) |
Measurement Methods
NIOSH 0500 , 0600
See: NMAM or OSHA Methods |
Physical Description Odorless, white powder or colorless, crystalline solid. [Note: May have blue, gray, or reddish tinge.] |
MW: 136.1 |
BP: Decomposes |
MLT: 2840°F (Decomposes) |
Sol: 0.3% |
VP: 0 mmHg (approx) |
IP: NA |
Sp.Gr: 2.96 |
Fl.P: NA |
UEL: NA |
LEL: NA |
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| Noncombustible Solid |
Incompatibilities & Reactivities Diazomethane, aluminum, phosphorus, water [Note: Hygroscopic (i.e., absorbs moisture from the air). Reacts with water to form Gypsum & Plaster of Paris.] |
Exposure Routes inhalation, skin and/or eye contact |
Symptoms irritation eyes, skin, upper respiratory system; conjunctivitis; rhinitis, epistaxis (nosebleed) |
Target Organs Eyes, skin, respiratory system |
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Personal Protection/Sanitation (See protection codes)
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash
Breathing: Fresh air
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Respirator Recommendations Not available.
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 1589
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