Synthetic Ferric Oxide Yellow
Excipient (pharmacologically inactive substance)
What is it?
FDA regulates color additives used in foods, drugs, cosmetics, and medical devices. Synthetic ferric oxide yellow is a yellow pigment synthesized and used in the pharmaceutical industry as a coating pigment. It is also known as yellow iron oxide [Fe2O3]. It exists as an amorphous yellow powder, and is primarily used in the cosmetics industry. 
 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 08/19/2011
 U.S. Food and Drug Administration. Color Additives: FDA's Regulatory Process and Historical Perspectives. Accessed 10/20/2011. http://www.fda.gov/ForIndustry/ColorAdditives/RegulatoryProcessHistoricalPerspectives/default.htm