Also known as: FD&C Yellow No. 6, Orange Yellow S, CI 15985
Vegan
A synthetic azo dye produced from petrochemicals. Entirely synthetic with no animal-derived components.
Ingredient Data
Vegan
E110
FD&C Yellow No. 6; Orange Yellow S; CI 15985
A synthetic azo dye produced from petrochemicals. Entirely synthetic with no animal-derived components.
Orange-coloured drinks, sweets, jelly, apricot jam, marmalade, some medications, biscuits.
No substitute needed — E110 is vegan. Natural alternatives include beta-carotene (E160a) or annatto (E160b) for orange shades.
One of the 'Southampton Six' food dyes linked to hyperactivity in children (McCann et al., The Lancet, 2007). Carries the EU mandatory warning label: 'may have an adverse effect on activity and attention in children'. Banned in Norway and Finland. Permitted in the USA, UK, and EU. Vegan but controversial for health reasons unrelated to animal welfare.
In depth
Sunset Yellow FCF is an azo dye, a class of synthetic colorants defined by a nitrogen-nitrogen double bond in the molecular structure. It is manufactured entirely from petroleum-derived aromatic compounds through standard industrial chemistry: a sulfonated aromatic amine is diazotized and then coupled with a sulfonated naphthalene derivative, and the sulfonate groups make the finished dye water-soluble. The finished product is typically sold as a sodium salt in the form of an orange-red powder or granules.
No step of this synthesis uses animal-derived raw materials, processing aids, or carriers, which is why Sunset Yellow is generally classified as vegan by ingredient databases and vegan organizations. This places it in the same category as most other synthetic azo dyes, such as Tartrazine (E102) and Allura Red (E129).
The one caveat some vegans raise is historical animal testing. Like virtually all food additives, Sunset Yellow underwent extensive animal toxicity studies to gain regulatory approval. This testing is part of the additive's regulatory history rather than its ongoing production, and most vegan organizations do not consider it grounds for avoidance, though individual views differ.
Labeling conventions for this dye differ sharply by region, which trips up label readers who shop internationally. In the European Union and the United Kingdom, it appears as "Sunset Yellow FCF" or simply "E110" in the ingredient list. In the United States, the same substance is declared as "FD&C Yellow No. 6," often shortened to "Yellow 6" on packaging. Older or technical documentation may use "Orange Yellow S" or the Colour Index designation CI 15985.
In the EU, products containing Sunset Yellow are also required to carry an additional warning statement that the color "may have an adverse effect on activity and attention in children." This warning, mandatory since the regulation took effect in 2010, makes E110 easy to spot on European packaging even without scanning the full ingredient list.
Because the dye produces a warm orange shade at low cost, it is common in orange soft drinks, candy, dessert mixes, snack coatings, and the coating of some tablets and capsules. Checking for both the E-number and the US name covers most packaged foods.
Sunset Yellow is permitted as a food color in the United States, the European Union, the United Kingdom, and most other major markets, though the conditions attached to its use vary. The EU imposes maximum permitted levels by food category and, uniquely, the child-hyperactivity warning label that followed the 2007 Southampton study published in The Lancet. That study examined mixtures of six artificial colors plus a preservative and reported an association with increased hyperactivity in some children, prompting the European Food Safety Authority to review the dye and EU legislators to mandate the warning.
The US Food and Drug Administration takes a different position: it requires Yellow 6 to be listed by name on labels and each batch to be certified, but it has not required a behavioral warning, concluding that the evidence does not establish a causal link for the general population.
Several Nordic countries historically restricted or banned the dye before European food law was harmonized, a fact still widely cited. For vegans, none of these disputes involve animal-derived content; the controversy is entirely about child behavior and general safety.
The obvious homes for Sunset Yellow are orange-colored sweets and soft drinks, but the dye turns up in many products where consumers do not expect an added color. In the United States, Yellow 6 has long been used in cheese-flavored snacks, some boxed macaroni-and-cheese powders, and cheese-flavored crackers, where it deepens the orange of the cheese seasoning, though a number of major brands have since reformulated with natural colors. It also appears in some breadcrumb coatings, instant noodle seasonings, dessert mixes, and marshmallow-based candies.
Outside the food aisle, Sunset Yellow is used in pharmaceuticals and supplements, coloring tablet coatings, gelatin capsules, and syrups. People checking medications for vegan status usually focus on gelatin or lactose and may not realize the coloring itself is listed separately; in this case the dye is vegan, though the capsule around it may not be. The dye is also permitted in cosmetics in many markets, where it appears under the name CI 15985.
Because reformulation is common — many European brands replaced Southampton Six dyes with natural colors after 2010 — the same product can contain E110 in one country and paprika extract or beta-carotene in another. Reading the local label remains the only reliable check.
Frequently asked questions
Yes. Sunset Yellow FCF is a fully synthetic azo dye made from petroleum-derived compounds, with no animal-derived ingredients or processing aids at any stage of production. Like all approved food additives, it was historically tested on animals for regulatory approval, which some vegans weigh separately, but the substance itself is vegan.
Yes. FD&C Yellow No. 6 is the US name for the same dye that Europe labels as E110 or Sunset Yellow FCF. It may also appear as Orange Yellow S or under the Colour Index number CI 15985 in cosmetics and technical documents.
Because it is one of the six dyes examined in the 2007 Southampton study, which reported a link between mixtures of these colors and increased hyperactivity in some children. Since 2010, EU law has required products containing E110 to state that it "may have an adverse effect on activity and attention in children." The US FDA reviewed the same evidence and did not impose a comparable warning.
It has been restricted or banned in some countries at various times, most notably in Nordic countries before EU food law was harmonized. Today it is permitted in the EU, UK, and US, subject to maximum levels and, in the EU, a mandatory warning label. Regulations change, so local rules are worth checking for any specific market.
It is most common in orange soft drinks, candy, jelly, dessert mixes, apricot jam, and marmalade. Less obvious sources include some cheese-flavored snacks and macaroni-and-cheese powders in the US, instant noodle seasonings, breadcrumb coatings, and the colored coatings of tablets and capsules.
For an orange shade, the main natural alternatives are beta-carotene (E160a), annatto (E160b), and paprika extract (E160c), all of which are vegan; annatto and paprika extract are plant-derived, while beta-carotene may be plant-derived or synthetic. They are generally less heat- and light-stable than the synthetic dye and cost more, which is why many mass-market products still use E110. No substitute is needed for vegan reasons, since E110 itself is vegan.