Alumina, also known as aluminum oxide, is an inorganic compound consisting of oxygen and aluminum. In cosmetic and personal care products, it is used in cleansing products, lipsticks, blushers and other products.
The Food and Drug Administration (FDA) has approved the use of Alumina as a color additive for direct addition to drugs.FDA: Link to Code of Federal Regulations for Alumina
http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRS...
More information about aluminum.