Excipient (pharmacologically inactive substance)

What is it?

FDA has regulatory review for color additives used in foods, drugs, cosmetics, and medical devices. Ferric oxide red (Fe2O3), also known as iron (III) oxide, is a coloring agent for tablets and capsules and is used in the pharmaceutical industry. Ferric oxide red occurs naturally as hematite ore and rust. Iron oxides are also commonly used in the cosmetics industry. Iron oxides for use in pharmaceutical manufacturing may also be synthetic.^[1][2]