Plaster of Paris (Ca(SO4).1/2H2O) Chemical Properties

Melting point:

163 °C

Density 

1.55 g/cm3

storage temp. 

-20°C

EPA Substance Registry System

Plaster of Paris (Ca(SO4).1/2H2O) (26499-65-0)

Safety Information

OEB

B

OEL

TWA: 10 mg/m3 (total)

Plaster of Paris (Ca(SO4).1/2H2O) Usage And Synthesis

Definition

ChEBI: Calcium sulfate hemihydrate is a calcium salt and a hydrate.

General Description

White or yellowish, finely divided, odorless powder consisting mostly or entirely of calcium sulfate hemihydrate, CaSO4·1/2H2O. Forms a paste when Plaster of Paris (Ca(SO4).1/2H2O) is mixed with water that soon hardens into a solid. Used in making casts, molds, and sculpture. Generally non-toxic.

Reactivity Profile

Plaster of Paris (Ca(SO4).1/2H2O) is non-flammable and non-combustible. Has generally low chemical reactivity but can act as an oxidizing agent under extreme conditions. Decomposes at high temperature to generate toxic oxides of sulfur. Reacts exothermically but slowly with moisture in the air or water to form gypsum CaSO4.2H2O.

Plaster of Paris (Ca(SO4).1/2H2O)(26499-65-0)Related Product Information

• Human SPARC-related modular calcium-binding protein 2(SMOC2) ELISA kit
• Human SNED1 protein (SNED1) ELISA detection kit
• Human SMAD homolog 7 (SMAD7) ELISA kit
• Human SMAD homolog 5 (SMAD5) ELISA kit
• Human SMAD homolog 4 (SMAD4) ELISA kit
• Human SMAD homolog 3 (SMAD3) ELISA kit
• Human SMAD homolog 2 (SMAD2) ELISA kit
• Human SLIT homolog 3 (SLIT3) ELISA kit