Calcium Sulfate

**Definition:** A calcium salt that is used for a variety of purposes including: building materials, as a desiccant, in dentistry as an impression material, cast, or die, and in medicine for immobilizing casts and as a tablet excipient. It exists in various forms and states of hydration. Plaster of Paris is a mixture of powdered and heat-treated gypsum.

**Tree numbers:** - D01.146.375 - D01.578.215 - D01.875.800.800.850.125

**Synonyms:** - Calcium Sulphate