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Ferrous Oxide

Excipient (pharmacologically inactive substance)

What is it?

Ferrous oxide (FeO), or iron (II) oxide, is an iron oxide and exists as a black powder. It is not rust (ferric oxide). Iron(II) oxide makes up part of the earth's mantle. Synthetic iron oxide is approved for used as a pigment in certain foods, cosmetics, contact lenses and drugs.[1][2]

[1] [1]FoodFacts.com Ingredient Glossary - iron oxides. Accessed March 30, 2014. http://www.foodfacts.com/food-ingredients/Iron-Oxides/4607

[2] FDA. For Industry. Summary of Color Additives for Use in the United States in Foods, Drugs, Cosmetics, and Medical Devices. Accessed April 1, 2014. http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfCFR/CFRSearch.cfm?fr=73.1200

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