Agent Name

Plaster of Paris

CAS Number

26499-65-0

Formula

O4-S.Ca.1/2H2-O

Major Category

Mineral Dusts

Synonyms

Calcium sulfate hemihydrate; Dried calcium sulfate; Gypsum hemihydrate; Hemihydrate gypsum; [NIOSH]

Category

Other Mineral Dusts

Description

White or yellowish, finely divided, odorless powder; [NIOSH]

Comments

Plaster of Paris, manufactured from gypsum (hydrated calcium sulfate), is regulated by OSHA as a nuisance dust.

Exposure Assessment
PEL (OSHA)

15 mg/m3(total dust), 5 mg/m3(respirable fraction)

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