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Chemical Sampling Information (CSI)
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General Description

Synonyms: Natural Calcium Sulfate; CaSO4•2H2O; Calcium(II) sulfate dihydrate; Gypsum stone; Hydrated calcium sulfate; Mineral white

OSHA IMIS Code Number: 1367

Chemical Abstracts Service (CAS) Registry Number: 13397-24-5

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: MG2360000

NIOSH Pocket Guide to Chemical Hazards, Gypsum: chemical description, physical properties, potentially hazardous incompatibilities, and more

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 29 CFR 1910.1000 Table Z-1 - 15 mg/m3 TWA

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, upper respiratory system; cough, sneezing, rhinorrhea (discharge of thin mucous), nosebleed; INGES. ACUTE: GI blockage if material harden

Health Effects: Nuisance particulate (Accumulation in Lungs) (HE19)

Affected Organs: Eyes, skin, respiratory system

Notes:

  1. A comparison of gypsum miners in two locations found a higher incidence of mild pneumonconionic changes in the lungs of miners working in the location where the gypsum had a higher contamination with quartz.

Literature Basis:

  • NIOSH Pocket Guide to Chemical Hazards: Gypsum.
  • International Chemical Safety Cards (WHO/IPCS/ILO): Gypsum.
  • Oakes, D., Douglas, R., Knight, K., Wusterman, M. and McDonald, J.C.: Respiratory effects of prolonged exposure to gypsum dust. Ann. Occup. Hyg. 26(1-4): 833-840, 1982.
  • 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.

Date Last Revised: 10/04/2005

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

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