| Agent Name |
Calcium sulfate |
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| CAS Number |
7778-18-9 |
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| Formula |
Ca.O4-S |
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| Major Category |
Mineral Dusts |
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| Synonyms |
Anhydrous calcium sulfate; Anhydrous gypsum; Anhydrous sulfate of lime; Calcium salt of sulfuric acid [NIOSH] Anhydrous calcium sulfate; Anhydrous sulfate of lime; Gypsum; Plaster of Paris; Drierite; [ACGIH] |
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| Category |
Other Mineral Dusts |
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| Description |
Odorless, white powder or colorless, crystalline solid. [Note: May have blue, gray, or reddish tinge; [NIOSH] |
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| Sources/Uses |
Gypsum is the dihydrate form and Plaster of Paris is the hemihydrate form. [NIOSH] Used in cement and paper filler (insoluble anhydrite), in a drying agent (soluble anhydrite), in wall plaster and wallboard (hemihydrate), and in soil treatment, Plaster of Paris, Portland cement, water clarification, animal feed, and calcium supplements in food (dihydrate gypsum); The natural forms are the mineral anhydrite (CaSO4) and the dihydrate, gypsum (CaSO4 . 2H2O). [ACGIH] |
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| Comments |
TLV based on "nasal symptoms." Calcium sulfate is a "relatively non-toxic substance." "Human epidemiologic studies were lacking in exposure information or were confounded by quartz exposure." [ACGIH] |
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| Exposure Assessment |
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| Skin Designation (ACGIH) |
No |
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| TLV (ACGIH) |
10 mg/m3, inhalable fraction |
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| PEL (OSHA) |
15 mg/m3(total dust), 5 mg/m3(respirable fraction) |
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| MAK |
4 mg/m3(inhalable fraction), 1.5 mg/m3(respirable fraction) |
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| Links to Other NLM Databases |
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| Health Studies |
Human Health Effects from Hazardous Substances Data Bank: CALCIUM SULFATE
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