COLOR INDEX (CI)

The Color Index (CI) identifies dyes by numbers that designate specific color pigments, such as CI 77007 for ultramarine blue. Dyes in cosmetic products are, according to the EU Cosmetics Regulation (EC) No. 1223/2009, ingredients that primarily serve to give color to cosmetic products or body parts. Annex IV of the regulation lists approved dyes that are subject to strict safety tests before they can be used. Furthermore, the regulation sets specific maximum concentrations and permitted areas of use for certain dyes to ensure the safety of application in cosmetic products. (1,2)

(1) European Union. (2009). Regulation (EC) No. 1223/2009 of the European Parliament and of the Council of 30 November 2009 on cosmetic products.  

(2) Wich, E. (1977). The Colour Index. Color Research and Application, 2, 77-80.

(3) Bährle-Rapp, M. (2012). Springer Lexikon der Kosmetika und Körperpflegemittel. 4th revised and expanded edition. Springer.