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Chemical Sampling Information |
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| Plaster of Paris (Total Dust) |
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General Description
Synonyms: Calcium sulfate hemihydrate; Dried calcium sulfate; Gypsum hemihydrate; Hemihydrate gypsum
OSHA IMIS Code Number: 2127
Chemical Abstracts Service (CAS) Registry Number: 26499-65-0
NIOSH, Registry of Toxic Effects (RTECS) Identification Number: TP0700000
NIOSH Pocket Guide to Chemical Hazards, Plaster of Paris: chemical description, physical properties, potentially hazardous incompatibilities, and more
Exposure Limits
OSHA Permissible Exposure Limit (PEL) for General Industry: 29 CFR 1910.1000 Z-1 Table -- 15 mg/m3 TWA
OSHA Permissible Exposure Limit (PEL) for Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 15 mg/m3 TWA
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 10 mg/m3 TWA; The value is for particulate matter containing no asbestos and <1% crystalline silica. (TLV listed under Calcium Sulfate)
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 10 mg/m3 TWA
Health Factors
Potential symptoms: Irritation of eyes, skin, mucous membranes, respiratory system; cough, nosebleed; INGES. ACUTE: GI blockage if material hardens
Health Effects: Nuisance particulate (HE19)
Affected organs: Eyes, skin, respiratory system
Notes: Although a study by NIOSH of causes of death among plasterers found a significant increase (24%) above the expected incidence for lung cancer, this increase was attributed to the asbestos component (5-12% by weight), rather than the plaster of Paris component, of most spackling compounds that were in use up to the late 1960s.
Date Last Revised: 10/04/2005
Literature Basis:
- NIOSH Pocket Guide to Chemical Hazards: Plaster of Paris.
- International Chemical Safety Cards (WHO/IPCS/ILO): Plaster of Paris.
- Pohanish, R.P. (editor): Calcium Sulfate. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 472-474.
- Stern, F., Lehman, E. and Ruder, A.: Mortality among unionized construction plasterers and cement masons. Am. J. Ind. Med. 39(4): 373-388, 2001.
Monitoring Methods used by OSHA
Laboratory Sampling/Analytical Method:
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Page last updated: 04/07/2006
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