Chalk, Prepared

Name:
Chalk, Prepared
Detailed information:

Chemistry name:	drop chalk; calcium carbonate, prepared
Properties:
Fine, white to grayish-white impalpable powder; often formed in conical drops. Odorless; tasteless; stable in air. Mp (decomposes at 825C with evolution of carbon dioxide). Decomposed by acids; practically insoluble in water; insoluble in alcohol. Noncombustible.
Derivation:
By grinding native calcium carbonate to a fine powder, agitating with water, allowing the coarser particles to settle, decanting the suspension, and allowing the fine particles to settle slowly.
Use:
Medicine (antacid), tooth powders, calcimine, polishing powders, silicate cements.

See Whiting; Calcium Carbonate.