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Calcium Sulfate Anhydrous

Excipient (pharmacologically inactive substance)

What is it?

Calcium sulfate (CaO4S) anhydrous is a calcium salt that is used for a variety of purposes including: building materials, as a desiccant (drying agent), in dentistry as an impression material, cast, or die, and in medicine for immobilizing casts and as an inactive ingredient tablet excipient and color glaze. It exists in various forms and states of hydration; the anhydrous form has the water molecules removed. It exists as a fine, white to slightly yellow-white odorless powder. It is also used as an anti-caking agent and colorant.

[1] Code of Federal Regulations, Title 21, Volume 3, Revised as of April 1, 2013. CITE: 21CFR184.1230http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfCFR/CFRSearch.cfm?fr=184.1230 Accessed 1/14/2014.

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