Fd & C Yellow #6 & Red #40

FD&C Yellow #6 (also known as Sunset Yellow FCF) and FD&C Red #40 (also known as Allura Red AC) are synthetic food color additives. They are petroleum-based azo dyes, meaning they are chemically synthesized from crude oil derivatives.

These dyes are added to foods and beverages to impart orange and red colors, respectively, or to enhance existing colors. They are frequently found in soft drinks, sports drinks, candies, baked goods, and processed snacks to make them visually appealing.

FD&C Yellow #6 and Red #40 are approved by the FDA as color additives for use in food. JECFA has evaluated both dyes and set acceptable daily intakes. EFSA has also evaluated these dyes. Some studies have suggested a link between synthetic food dyes, including Yellow #6 and Red #40, and hyperactivity in some children, though the evidence is mixed and not conclusive for the general population. In April 2025, the FDA announced a plan to phase out petroleum-based synthetic dyes, including Red #40 and Yellow #6.