CI 77510

CI 77510, also known as ferric ferrocyanide or Prussian blue, is an inorganic synthetic pigment commonly used in cosmetics. It is a deep blue iron compound that serves as a colorant in skincare and makeup products.In skincare formulations, CI 77510 is primarily used to provide colour and improve the visual appearance of products. It is insoluble in water and does not penetrate the skin; instead, it remains on the surface as a cosmetic agent.

CI 77510 works as a colorant through light absorption and reflection. The pigment particles scatter and absorb visible light wavelengths, creating the perception of blue colour in the product. Because it is a mineral pigment, it does not undergo chemical reactions on the skin; it simply provides visual tint to formulations.When applied topically, the pigment particles sit on the skin surface and can offer a subtle colour-correcting effect by counteracting warm tones, though the effect is purely cosmetic.

Products containing CI 77510 should be used as directed. Because it is a colorant with no active therapeutic claim, its presence does not alter how or when you use a product. Shake or mix formulations well before use to ensure the pigment is evenly distributed throughout the product.

CI 77510 is considered safe for cosmetic use and is approved for use in skincare in major regulatory regions. It is inert and non-penetrating, making allergic contact dermatitis unlikely, though patch testing is advisable if you have known sensitivities to iron compounds.