Agent Name

Gypsum

CAS Number

13397-24-5

Formula

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

Major Category

Mineral Dusts

Synonyms

Calcium(II) sulfate dihydrate; Gypsum stone; Hydrated calcium sulfate; Mineral white [Note: Gypsum is the dihydrate form of calcium sulfate; Plaster of Paris is the hemihydrate form.]

Category

Other Mineral Dusts

Description

White or nearly white, odorless, crystalline solid;

Sources/Uses

Used to manufacture plasterboard and plaster of Paris; [Harber, p. 358]

Comments

A cross-sectional study of 241 British gypsum miners in Sussex and Nottinghamshire with over 20 years of exposure identified x-ray findings consistent with a simple pneumoconiosis. Sixty-four miners had >1/0 on the ILO scale and 3 miners had 2/1 or greater. The authors attributed the higher rates of slight pneumoconiosis in the Sussex miners to the higher levels of quartz in these mines where the levels of gypsum dust were lower. [ACGIH] See "Calcium sulfate."

Exposure Assessment
Skin Designation (ACGIH)

Insufficient data

TLV (ACGIH)

10 mg/m3, inhalable fraction

MAK

4 mg/m3, (inhalable fraction), 1.5 mg/m3 (respirable fraction)

Adverse Effects
Fibrogenic

Yes

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: