plaster of Paris A fine white powder that is made from gypsum, which is calcium sulfate. dihydrate A soft sulfate mineral composed of It is used as a building material and for making molds and castings in arts and crafts projects.
When mixed with water, it forms a paste that can be applied to a mold or surface and forms a hard and durable material when dry. to make casts to immobilize broken bones plaster of Paris is also commonly used in medicine.
Physical Properties of Plaster of Paris | plaster of paris ke bhautik gun
plaster of Paris is a fine white powder containing gypsum, a hydrous calcium sulfate mineral it happens. When mixed with water, it forms a paste that hardens when dry. The physical properties of plaster of paris include.
- It is a white, powdery substance with a slightly gritty texture.
- It has a specific gravity of 2.3–2.4, which means it is relatively dense.
- It has a pH of 7.5–8.5, making it slightly alkaline.
- It is insoluble in water and organic solvents.
- It has a setting time of about 5-10 minutes and a hardening time of about 24 hours.
- It has a compressive strength of approximately 3000 psi (pounds per square inch).
- It is brittle and can be easily damaged if not handled with care.
- It is a good thermal and sound insulator.
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