Calcium sulfate
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CAS
7778-18-9
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CaSO4
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RTECS
WS6920000
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Synonyms & Trade Names
Anhydrous calcium sulfate, Anhydrous gypsum, Anhydrous sulfate of lime, Calcium salt of sulfuric acid [Note: Gypsum is the dihydrate form & Plaster of Paris is the hemihydrate form.]
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DOT ID & Guide
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Exposure
Limits
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NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)
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OSHA PEL: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
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IDLH
N.D.
See: IDLH INDEX
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Conversion
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Physical Description
Odorless, white powder or colorless, crystalline solid. [Note: May have blue, gray, or reddish tinge.]
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MW: 136.1
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BP: Decomposes
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MLT: 2840°F (Decomposes)
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Sol: 0.3%
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VP: 0 mmHg (approx)
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IP: NA
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Sp.Gr: 2.96
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Fl.P: NA
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UEL: NA
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LEL: NA
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Noncombustible Solid
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Incompatibilities & Reactivities
Diazomethane, aluminum, phosphorus, water [Note: Hygroscopic (i.e., absorbs moisture from the air). Reacts with water to form Gypsum & Plaster of Paris.]
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Measurement Methods
NIOSH 0500, 0600
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
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
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Exposure Routes
inhalation, skin and/or eye contact
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Symptoms
Irritation eyes, skin, upper respiratory system; conjunctivitis; rhinitis, epistaxis (nosebleed)
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Target Organs
Eyes, skin, respiratory system
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