26499-65-0

Basic information

• Product Name: Plaster of Paris (Ca(SO4).1/2H2O)
• Synonyms: Plaster of Paris (Ca(SO4).1/2H2O);Plaster of Paris respirable dust;Plaster of Paris total inhalable dust;Ai3-01697;Crystacal;Densite;Densite (gypsum);Fgr
• CAS NO: 26499-65-0
• Molecular Formula: Ca. H2 O4 S . 1/2 H2 O
• Molecular Weight: 290.2965
• Mol File: 26499-65-0.mol
• Article Data: 0

Chemical Properties

• Melting Point: 163 °C
• Boiling Point: 330°Cat760mmHg
• Flash Point: °C
• Appearance: /
• Density: g/cm³
• Storage Temp.: -20°C
• CAS DataBase Reference: Plaster of Paris (Ca(SO4).1/2H2O)(CAS DataBase Reference)
• NIST Chemistry Reference: Plaster of Paris (Ca(SO4).1/2H2O)(26499-65-0)
• EPA Substance Registry System: Plaster of Paris (Ca(SO4).1/2H2O)(26499-65-0)

Safety Data

• Hazardous Substances Data: 26499-65-0(Hazardous Substances Data)

Usage

Description

Plaster of Paris (Ca(SO4).1/2H2O) is a white or yellowish, finely divided, odorless powder that consists mostly or entirely of calcium sulfate hemihydrate. When mixed with water, it forms a paste that quickly hardens into a solid. This property makes it suitable for various applications, particularly in the creation of casts, molds, and sculptures. It is generally considered non-toxic.

Uses

Used in Medical Applications:
Plaster of Paris (Ca(SO4).1/2H2O) is used as a casting material for immobilizing broken bones and setting fractures. The quick hardening property allows for a stable and supportive structure that aids in the healing process.
Used in Art and Sculpture:
In the art industry, Plaster of Paris (Ca(SO4).1/2H2O) is used as a mold-making material for creating detailed casts and molds of sculptures. Its ability to harden rapidly and maintain fine details makes it an ideal choice for replicating intricate designs.
Used in Construction and Modeling:
Plaster of Paris (Ca(SO4).1/2H2O) is used as a modeling material for creating architectural models and prototypes. Its ease of use and quick-setting properties allow for efficient and accurate representation of structures.
Used in Dental Applications:
In dentistry, Plaster of Paris (Ca(SO4).1/2H2O) is used as an impression material for taking accurate molds of teeth and oral structures. The hardening paste provides a stable and detailed replica that can be used for various dental procedures, such as creating dental prosthetics and restorations.
Used in Educational Purposes:
Plaster of Paris (Ca(SO4).1/2H2O) is used as an educational tool for teaching students about the properties of different materials and their applications in various fields. Its versatility and ease of use make it an excellent choice for hands-on learning experiences.

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.