Synonyms: Natural Calcium Sulfate

OSHA IMIS Code Number: G101

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

Chemical Description and Physical Properties:

a soft mineral usually found in wallboard. See also plaster of paris
molecular formula: CaSO₄• 2H₂O

OSHA Permissible Exposure Limit (PEL):

General Industry: See Dust (Respirable Nuisance) or Dust, Total

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 5 mg/m³ TWA

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

Primary Laboratory Sampling/Analytical Method (SLC1):

• See Particulates not otherwise regulated (Respirable Fraction)

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