Yellow No. 5 (Tartrazine): FDA Phase-Out, State Bans & Compliance Guide

What Is Yellow No. 5?

FD&C Yellow No. 5, known chemically as tartrazine (CAS 1934-21-0, UNII: I753WB2F1M), is a synthetic lemon-yellow azo dye used to color foods, drugs, and cosmetics. It is designated as E102 in the European Union and is also known as C.I. 19140, Acid Yellow 23, and Food Yellow 4. Tartrazine was permanently listed by the FDA in 1969 and is authorized under 21 CFR 74.705 (food use), 21 CFR 74.1705 (drug use), and 21 CFR 74.2705 (cosmetic use).

Yellow No. 5 holds a unique regulatory position among FDA-approved color additives. Under 21 CFR 101.22(k), all certified (FD&C) color additives must be declared by name in the ingredient statement — a requirement that applies to all six remaining synthetic dyes, not just tartrazine. What is unique to Yellow No. 5 is the drug labeling requirement: 21 CFR 201.20 requires a specific warning that FD&C Yellow No. 5 may cause allergic-type reactions, including bronchial asthma, in certain susceptible persons, particularly those with aspirin hypersensitivity. No other certified color additive carries this drug-specific warning. These labeling rules, in place since the 1980s, reflect decades of documented sensitivity reactions that set tartrazine apart from the other remaining petroleum-based food dyes.

All batches of FD&C Yellow No. 5 must be certified by the FDA in accordance with 21 CFR Part 80 before commercial use. The dye is one of the most widely used synthetic colorants in the U.S. food supply, appearing in products ranging from breakfast cereals and beverages to confections, snack foods, and pharmaceutical tablets.

Current FDA Regulatory Status

Yellow No. 5 remains a listed and authorized color additive in the United States as of March 2026. It has not been banned or formally revoked. However, it is subject to a high-profile voluntary phase-out initiative that fundamentally changes its commercial trajectory.

The April 22, 2025 Announcement

On April 22, 2025, HHS Secretary Robert F. Kennedy Jr. and FDA Commissioner Dr. Marty Makary announced that the FDA would work with the food industry to eliminate all petroleum-based synthetic food dyes from the U.S. food supply. The announcement, delivered as part of the Make America Healthy Again (MAHA) initiative, targeted six remaining certified color additives for voluntary phase-out:

• FD&C Yellow No. 5 (tartrazine)
• FD&C Yellow No. 6 (sunset yellow)
• FD&C Red No. 40 (allura red)
• FD&C Blue No. 1 (brilliant blue)
• FD&C Blue No. 2 (indigotine)
• FD&C Green No. 3 (fast green)

The FDA's official communications reference elimination by the end of 2027 as the industry compliance window, though HHS Secretary Kennedy separately announced an accelerated goal of end of 2026. The FDA also announced formal revocation proceedings for two rarely used dyes -- Citrus Red No. 2 and Orange B -- which are being removed through rulemaking rather than voluntary action.

This announcement came three months after the FDA's formal ban on FD&C Red No. 3 (erythrosine) under the Delaney Clause (January 15, 2025), which served as the opening move in the administration's campaign against synthetic colorants.

What "Voluntary Phase-Out" Means

The distinction between the Red No. 3 ban and the Yellow No. 5 phase-out is critical for compliance planning. Red No. 3 was revoked through formal rulemaking under the Delaney Clause, creating hard statutory deadlines (January 15, 2027 for food; January 18, 2028 for drugs). Products containing Red No. 3 after those dates will be legally adulterated.

The Yellow No. 5 phase-out, by contrast, is a voluntary understanding between the FDA and industry. There is no proposed rule, no Federal Register notice, and no statutory deadline for removing tartrazine from food products. The FDA is tracking industry pledges through a public commitment tracker on its website, and by early 2026, approximately 40% of the packaged food supply had committed to near-term removal of synthetic dyes. Major manufacturers including Nestle, Kraft Heinz, and others have announced reformulation timelines.

However, the 21 CFR 74.705 listing remains in force. Yellow No. 5 is not illegal to use in food. Companies that continue to use it are not in violation of federal law -- they are simply out of step with the current administration's stated policy direction. Whether the FDA will pursue formal revocation if voluntary compliance stalls remains an open question.

MAHA Initiative and Political Context

The food dye phase-out is a centerpiece of the Make America Healthy Again (MAHA) agenda championed by HHS Secretary Kennedy. The initiative positions synthetic food dyes as emblematic of a broader problem with the U.S. food supply, linking them to children's behavioral health and chronic disease.

The political momentum is substantial. In 2025 alone, roughly 140 bills targeting food dyes and additives were introduced across 38 states, according to the National Conference of State Legislatures. The MAHA movement has found bipartisan traction in statehouses, with school food restrictions proving especially popular across the political spectrum.

For the FDA, the phase-out represents a novel regulatory approach: using public pressure and industry negotiation rather than formal rulemaking to achieve a policy goal. The agency is simultaneously accelerating the authorization of natural color alternatives, approving three new natural color additives in May 2025 (galdieria extract blue, butterfly pea flower extract, calcium phosphate) and a fourth (gardenia/genipin blue) in July 2025, along with expanded uses for spirulina extract and beetroot red.

At the federal legislative level, the Ban Harmful Food Dyes Act (H.R. 5027), introduced in the 119th Congress, would codify the ban on synthetic food dyes into statute, though its prospects for passage remain uncertain.

State-Level Restrictions

West Virginia -- HB 2354

Governor Patrick Morrisey signed HB 2354 into law on March 24, 2025, enacting the most aggressive state-level food dye restrictions in the country. The law targets Yellow No. 5 along with six other synthetic dyes in two phases:

• Phase 1 (August 1, 2025): Bans Yellow No. 5, Red No. 3, Red No. 40, Yellow No. 6, Blue No. 1, Blue No. 2, and Green No. 3 from meals served in school nutrition programs.
• Phase 2 (January 1, 2028): Bans the manufacture for sale, offer for sale, or sale of any food product in West Virginia containing these dyes, plus butylated hydroxyanisole (BHA) and propylparaben.

California -- AB 2316 (School Food Safety Act)

Signed in 2024, AB 2316 prohibits foods containing Yellow No. 5, Red No. 40, Yellow No. 6, Blue No. 1, Blue No. 2, and Green No. 3 from being served in K-12 school food programs in California. The compliance deadline is December 31, 2027.

Other States

By early 2026, 11 school food restriction bills had been enacted across eight states: Arizona, Delaware, Louisiana, Tennessee, Texas, Utah, Virginia, and West Virginia. Many include Yellow No. 5 in their scope. Additional legislation is pending in Illinois, New York, and numerous other states, with food dye restrictions emerging as one of the most active areas of state food policy.

Allergen and Sensitivity Profile

Tartrazine occupies a unique position among synthetic food dyes due to its well-documented association with adverse reactions in sensitive individuals. This is not a theoretical concern -- it is the reason the FDA imposed specific labeling requirements decades ago, making Yellow No. 5 the only color additive with allergen-style disclosure obligations.

Cross-Reactivity with Aspirin

The most clinically significant finding is the cross-reactivity between tartrazine and aspirin (acetylsalicylic acid). Both compounds inhibit cyclooxygenase, shunting eicosanoid metabolism toward leukotriene synthesis and increasing smooth muscle contraction and vascular permeability. Studies have reported tartrazine sensitivity in 20-50% of aspirin-sensitive individuals, though exact prevalence rates vary with study methodology.

In double-blind challenge studies, tartrazine sensitivity has been demonstrated in approximately 8% of patients with chronic urticaria of unknown etiology and up to 31% of aspirin-sensitive asthmatics. Manifestations include urticaria (hives), angioedema, rhinitis, and bronchospasm. Severe anaphylactoid reactions are rare but documented.

Regulatory Labeling Response

The sensitivity profile led to a series of FDA labeling requirements:

• 21 CFR 101.22(k): Foods must declare tartrazine by name, not generically as "artificial color"
• 21 CFR 74.705(d)(2): Food labeling must list FD&C Yellow No. 5 specifically
• 21 CFR 201.20: Prescription drugs must carry a warning about allergic-type reactions in aspirin-sensitive persons
• 21 CFR 74.1705: OTC and prescription drugs must declare both "FD&C Yellow No. 5" and "tartrazine"

These requirements predate the current phase-out initiative and remain in force regardless of the voluntary elimination timeline.

Behavioral Effects and the Southampton Study

The behavioral effects of synthetic food dyes have been debated for decades, but the evidence base that most directly influenced policy is the 2007 Southampton study (McCann et al.), published in The Lancet.

The study was a randomized, double-blinded, placebo-controlled trial of 153 three-year-old and 144 eight/nine-year-old children. Children consumed beverages containing mixtures of six synthetic dyes (including tartrazine) and sodium benzoate, then were assessed on a global hyperactivity aggregate (GHA) based on observed behaviors, teacher and parent ratings, and computerized attention tests. The results showed statistically significant increases in hyperactive behavior when children consumed the active mixtures compared to placebo.

The study has important limitations. The effects were not consistent across both age groups or both test mixtures. The study tested mixtures, not individual dyes, making it impossible to attribute effects to tartrazine specifically. The European Food Safety Authority (EFSA) concluded in 2008 that the study provided "limited evidence" of a "small effect" on activity and attention in "some children" -- a carefully hedged assessment.

Nevertheless, the Southampton study was the catalyst for the EU's mandatory warning label requirement and remains the most frequently cited evidence in the current U.S. policy debate. A broader body of research -- including meta-analyses of elimination diet studies -- suggests a modest but real effect of synthetic food dyes on children's behavior, though the magnitude and clinical significance remain contested.

International Regulatory Landscape

European Union

Tartrazine is authorized in the EU as E102 with an Acceptable Daily Intake (ADI) of 0-7.5 mg/kg body weight/day, established by EFSA in its 2009 re-evaluation and reaffirmed in subsequent reviews. The EU has not banned tartrazine.

However, since July 2010, any food or beverage product sold in the EU containing tartrazine (or five other "Southampton dyes") must carry a mandatory warning label stating: "may have an adverse effect on activity and attention in children." This labeling requirement, established under EU Regulation (EC) No 1333/2008, has had a de facto market effect: many European manufacturers have voluntarily reformulated to avoid the warning label, significantly reducing tartrazine's presence in European food products even without a formal ban.

JECFA (WHO/FAO)

The Joint FAO/WHO Expert Committee on Food Additives (JECFA) first evaluated tartrazine in 1966 and established the same ADI of 0-7.5 mg/kg bw/day that EFSA later adopted. JECFA has not revised this assessment or recommended restrictions on tartrazine use.

Country-Specific Restrictions

Tartrazine was historically banned in Norway, Austria, and Germany under national regulations, though these bans were largely superseded by EU Directive 94/36/EC, which harmonized color additive regulations across EU member states. Some non-EU countries maintain restrictions or bans. The regulatory trend internationally has been toward warning labels and ADI limits rather than outright prohibition.

Affected Product Categories

Tartrazine's wide spectrum of applications means the phase-out affects a broad cross-section of the food, supplement, and pharmaceutical industries:

• Confectionery and candy: Gummy bears, hard candy, marshmallows, chewing gum, cake decorations
• Beverages: Soft drinks, energy drinks, sports drinks, powdered drink mixes, flavored waters
• Cereals and baked goods: Corn flakes, flavored cereals, cake mixes, biscuits, cookies
• Snack foods: Flavored chips, cheese-flavored snacks, popcorn seasonings
• Dairy and frozen desserts: Ice cream, popsicles, flavored yogurt, custard, pudding
• Condiments and sauces: Mustard, pickles, salad dressings, flavored syrups
• Dietary supplements: Multivitamin tablets, capsule coatings, gummy vitamins
• Pharmaceuticals: Tablet coatings, capsule shells, liquid formulations (antacids, cold medications, cough drops)
• Pet food: Colored kibble and treats

Pharmaceutical applications deserve special attention. Drug reformulation requires stability testing, bioequivalence studies, and supplemental NDA/ANDA filings -- a process that typically takes 18-36 months. The current voluntary phase-out applies primarily to food products; pharmaceutical use of Yellow No. 5 is not addressed by the MAHA initiative's timeline.

What Companies Should Be Tracking

1. No formal ban exists yet. Yellow No. 5 remains listed at 21 CFR 74.705. The phase-out is voluntary. But the regulatory direction is unambiguous, and companies using tartrazine face increasing market, legislative, and reputational pressure to reformulate.

2. State law is moving faster than federal. West Virginia's school food ban took effect August 1, 2025. California's AB 2316 school ban takes effect December 31, 2027. Companies selling into school food channels must comply regardless of federal voluntary timelines.

3. Natural alternatives are available but imperfect. Turmeric, beta-carotene, saffron, and annatto can replicate yellow tones but behave differently in formulation (pH sensitivity, heat stability, shelf life). The FDA is accelerating authorization of new natural color additives.

4. The allergen labeling requirement is independent of the phase-out. Even during the transition period, products containing Yellow No. 5 must comply with 21 CFR 101.22(k) and related labeling regulations. This is not a new requirement, but enforcement attention may increase.

5. Watch for formal rulemaking. If the voluntary approach fails to achieve the FDA's stated goals, formal revocation of 21 CFR 74.705 through notice-and-comment rulemaking remains a possibility. The Red No. 3 precedent (via Delaney Clause) does not directly apply to Yellow No. 5, as tartrazine does not have a cancer finding that triggers the Delaney Clause. Any formal ban would need to be based on a safety determination under a different legal framework.

6. International harmonization pressures are growing. The EU's mandatory warning label, combined with the U.S. voluntary phase-out, is creating global momentum toward reformulation. Companies with international supply chains may find it more cost-effective to reformulate once for all markets.