Red 40 (Allura Red AC)
Also known as: Red Dye 40, Allura Red, FD&C Red No. 40, CI 16035, C.I. 16035, C.I. FOOD RED 17, DISODIUM 6-HYDROXY-5-((2-METHOXY-5-METHYL-4-SULFOPHENYL)AZO)-2-NAPHTHALENESULFONATE, D&C RED NO. 40, ALLURA RED, 2-NAPHTHALENESULFONIC ACID, 6-HYDROXY-5-((2-METHOXY-5-METHYL-4-SULFOPHENYL)AZO)-, DISODIUM SALT, 2-NAPHTHALENESULFONIC ACID, 6-HYDROXY-5-((6-METHOXY-4-SULFO-M-TOLYL)AZO)-, DISODIUM SALT, DISODIUM 6-HYDROXY-5-((6-METHOXY-4-SULFO-M-TOLYL)AZO)-2-NAPHTHALENESULFONATE, FOOD RED 17, ALLURA RED AC, FOOD RED NO. 40
Color additive · E129
Regulatory Status
United States (FDA)
ApprovedFDA-approved color additive. Most widely used food dye in the US. No warning label required.
European Union (EFSA)
ApprovedPermitted in EU but requires warning label: "may have an adverse effect on activity and attention in children" (Southampton study).
Safety Profile
FDA considers it safe at current usage levels. EU requires a warning label citing potential behavioral effects in children. Several countries have voluntary bans.
Health Concerns
- • Linked to hyperactivity in children (Southampton study, 2007)
- • Possible carcinogen concerns (debated)
- • California requires warning label as of 2027
Commonly Found In
Sources: FDA Substances Added to Food, EFSA opinions, EU Regulation 1333/2008, IARC monographs
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