As Preservatives FD&C Red No.40

FD&C Red No. 40, also known as Allura Red AC, is a synthetic red dye. It is made from petroleum-based raw materials through chemical synthesis.

Manufacturers add FD&C Red No. 40 to give foods and beverages a red color. It is commonly found in candies, soft drinks, processed snacks, and cereals.

FD&C Red No. 40 is an FDA-approved color additive for use in food. JECFA has evaluated it and set an acceptable daily intake. EFSA has also evaluated it and set an acceptable daily intake. Some studies have suggested a possible link between synthetic food dyes, including Red No. 40, and hyperactivity in some children, though the evidence is mixed and not all studies have found a consistent link. In April 2025, the FDA announced a plan to phase out petroleum-based synthetic dyes, including Red No. 40.