Basic Introduction: Gypsum plaster is a building material used for coating walls and ceilings. It’s a powder composed of calcium sulfate hemihydrate (

CaSO4​⋅21​H2​O

). When mixed with water, it rehydrates and sets, forming a hard, durable surface. Gypsum plaster is known for its smooth finish and fire-resistant properties.

Synonyms: Plaster of Paris, wall plaster

Chemical Formula:

CaSO4​⋅21​H2​O

(Calcium sulfate hemihydrate)

CAS NO.: 10034-76-1

8-digit HS Code: 25202090

Industries Used In:

• Construction: Primary use is for plastering interior walls and ceilings.
• Art and Sculpture: Used for making casts, molds, and sculptures due to its fine texture and quick setting time.
• Medical and Orthopedics: Used in making plaster casts for supporting fractured bones.

Application or Usage: Used as a smooth coating on walls and ceilings, for creating molds and casts, and in various construction and decorative applications.