CI 77510 (Ferric Ferrocyanide)

Established inorganic blue pigment with well-defined regulatory status in EU and US. EU permits in all cosmetics; US permits in externally applied and eye-area cosmetics but not in lip products. The cyanide component is chemically bound and not bioavailable; FDA specifies soluble cyanide limits to ensure safety. Low-concern colorant within approved use scope. US lip restriction should be noted by formulators. The EU classifies CI 77510 (Ferric Ferrocyanide) as "permitted". Safety rating: GOOD.

CI 77510 (Ferric Ferrocyanide) EU regulatory status: permitted. Maximum allowed concentration: Listed in Annex IV of EU Cosmetics Regulation (EC) No. 1223/2009; permitted as a colorant in all cosmetics and personal care products; must be free from cyanide ions. This is based on EU Regulation 1223/2009 and its amendments.

CI 77510 (Ferric Ferrocyanide) functions as: Colorant. Inorganic complex iron pigment also known as Prussian Blue (Pigment Blue 27). Chemical formula Fe4[Fe(CN)6]3. Produces a deep, vivid blue color in cosmetic formulations. Used in eye shadows, eyeliners, mascaras, hair coloring products, and nail polishes. The cyanide groups are tightly bound to the iron lattice and are not released under normal conditions of use. Approved for cosmetics as both Ferric Ferrocyanide and Ferric Ammonium Ferrocyanide variants. Must be free from cyanide ions per regulatory requirements.. It is classified as a cosmetic ingredient in our database. CAS number: 14038-43-8.

adequate The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.