Excipient (pharmacologically inactive substance)
What is it?
Castor wax (hydrogenated castor oil) is a hard, brittle, vegetable wax. Hydrogenated castor oil (castor wax) is also used an extended release agent; stiffening agent; tablet and capsule lubricant. Castor was is made by hydrogenation of pure castor oil, in the presence of a nickel catalyst. It is odorless and insoluble in water. In industry, castor wax is used in polishes, cosmetics, as a lubricant, and to impede moisture.
 Dave RH. Overview of pharmaceutical excipients used in tablets and capsules. Drug Topics (online). Advanstar. 10/24/2008 http://drugtopics.modernmedicine.com/drugtopics/Top+News/Overview-of-pharmaceutical-excipients-used-in-tabl/ArticleStandard/Article/detail/561047. Accessed 03/27/2014
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