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.