FD&C Green No. 3 (Fast Green FCF): FDA Phase-Out, State Bans & Compliance Guide

What Is Green No. 3?

FD&C Green No. 3, known commercially as Fast Green FCF and by its Colour Index designation C.I. 42053, is a synthetic triarylmethane dye that produces a sea-green to turquoise hue in food, drug, and cosmetic applications. Its chemical name is the inner salt disodium salt of N-ethyl-N-[4-[4-[ethyl[(3-sulfophenyl)methyl]amino]phenylmethylene]-2,5-cyclohexadien-1-ylidene]-3-sulfobenzenemethanaminium hydroxide.

Property	Value
CAS Registry Number	2353-45-9
UNII	3P3ONR6O1S
Colour Index	C.I. 42053
E Number	E143 (assigned but not authorized in the EU)
Molecular Formula	C₃₇H₃₄N₂Na₂O₁₀S₃
Appearance	Red to brown-violet powder; dissolves in water to give a blue-green solution at neutral pH

Fast Green FCF is a petroleum-derived colorant, meaning it is synthesized from aromatic hydrocarbons rather than extracted from natural sources. In its dry form, it appears as a dark powder, but in solution it produces the characteristic green-to-teal coloring that gives it commercial value.

Among all FDA-certified color additives, Green 3 holds a distinctive position: it is the least used of the seven synthetic dyes currently approved for general use in foods. Its applications are narrow, confined primarily to select candies, mint-flavored products, frozen desserts, some beverages, and a handful of breakfast cereals. Unlike Red 40 or Yellow 5, which are ubiquitous across the processed food supply, Green 3 occupies an extremely small niche. This limited usage profile has significant implications for both the regulatory phase-out effort and the reformulation burden facing manufacturers.

Green 3 is also used as a biological stain in laboratory settings, where its binding properties make it useful for protein detection in techniques such as the Fast Green protein assay — a fact that occasionally causes confusion between its industrial and scientific applications.

FDA Regulatory Status

FD&C Green No. 3 is currently listed as a certified color additive approved for use in foods, drugs, and cosmetics under the following Code of Federal Regulations sections:

• 21 CFR 74.203 — Food use: Approved for coloring foods (including dietary supplements) generally, in amounts consistent with current good manufacturing practice (cGMP)
• 21 CFR 74.1203 — Drug use: Approved for coloring drugs generally, in amounts consistent with cGMP
• 21 CFR 74.2203 — Cosmetic use: Approved for coloring cosmetics generally, in amounts consistent with cGMP

All batches must be certified by the FDA under 21 CFR Part 80 before commercial use. This batch certification requirement means the FDA analyzes a representative sample of each manufactured batch to verify it meets identity and purity specifications — a regulatory mechanism that provides a direct lever for enforcement if formal revocation were to occur.

Green 3 was permanently listed as subject to certification in 1982 and has remained continuously approved since then.

The April 2025 Voluntary Phase-Out

On April 22, 2025, HHS Secretary Robert F. Kennedy Jr. and FDA Commissioner Dr. Marty Makary announced a sweeping initiative to phase out all petroleum-based synthetic food dyes from the American food supply. This announcement targeted six certified color additives for voluntary industry elimination:

1. FD&C Red No. 40
2. FD&C Yellow No. 5
3. FD&C Yellow No. 6
4. FD&C Blue No. 1
5. FD&C Blue No. 2
6. FD&C Green No. 3

Separately, the FDA initiated formal revocation proceedings for two rarely used dyes — Citrus Red No. 2 and Orange B — through rulemaking. FD&C Red No. 3, which was already the subject of a January 2025 revocation order under the Delaney Clause (due to evidence of carcinogenicity in laboratory animals), was given an accelerated removal timeline.

The phase-out for the six remaining dyes, including Green 3, is voluntary — the FDA has not initiated rulemaking to revoke their food-use authorizations. Instead, the agency is relying on industry commitments, publicly tracked through the FDA's industry pledge portal.

By early 2026, approximately 40% of the packaged food supply had pledged near-term removal of synthetic dyes, with the FDA's updated target pushing for full elimination by the end of 2026.

It is important to note that the voluntary nature of this phase-out means Green 3 remains legally permitted in foods, drugs, and cosmetics as of this writing. There is no final rule revoking its authorization. However, regulatory momentum, state-level legislation, and consumer pressure are converging to make its continued use commercially untenable for most applications.

Drug and Cosmetic Implications

The April 2025 announcement focused on food use. Green 3's authorization for drug coloring (21 CFR 74.1203) and cosmetic coloring (21 CFR 74.2203) is not currently subject to phase-out. Pharmaceutical and cosmetic manufacturers are not under the same voluntary elimination pressure, though companies pursuing "clean label" positioning may choose to reformulate proactively.

Key Deadlines

Date	Event	Type
September 28, 2024	California Governor Newsom signs AB 2316, banning Green 3 (and 5 other dyes) from school foods	State (enacted)
March 24, 2025	West Virginia Governor Morrisey signs HB 2354, banning Green 3 in all food statewide	State (enacted)
April 22, 2025	FDA/HHS announces voluntary phase-out targeting Green 3 and 5 other petroleum-based dyes	Federal (voluntary)
August 1, 2025	West Virginia school meal ban takes effect	State (mandatory)
End of 2026	FDA's updated target for voluntary industry elimination of all 6 targeted dyes	Federal (voluntary)
July 1, 2027	Virginia school lunch ban takes effect (HB 1910 / SB 1289)	State (mandatory)
December 31, 2027	California AB 2316 school food ban takes effect	State (mandatory)
January 1, 2028	West Virginia statewide retail ban scheduled (currently enjoined by preliminary injunction)	State (enjoined)

State-Level Bans

State legislatures have moved significantly faster than the federal government on synthetic food dye restrictions. As of early 2026, food additive legislation had been introduced in 38 states, with over 140 bills filed in 2025 alone. Green 3 is included in virtually all of them.

West Virginia — HB 2354 (Signed March 24, 2025)

West Virginia became the first state to enact a comprehensive statewide ban on synthetic food dyes, including Green 3. Governor Patrick Morrisey signed HB 2354 into law on March 24, 2025. The law has two phases:

• Phase 1 — School meals (August 1, 2025): Foods containing Green 3 and six other certified dyes (Red 3, Red 40, Yellow 5, Yellow 6, Blue 1, Blue 2) are prohibited from school nutrition programs. This phase is currently in effect.
• Phase 2 — Statewide retail (January 1, 2028): Food items containing any of the seven banned dyes, plus BHA and propylparaben, would be prohibited from sale anywhere in the state.

However, in December 2025, a federal judge in the Southern District of West Virginia issued a preliminary injunction blocking enforcement of Phase 2 (the retail ban), finding the law unconstitutionally vague. The school meal provisions remain in effect and are not subject to the injunction. The case is ongoing.

California — AB 2316 (Signed September 28, 2024)

California was the first state in the nation to ban synthetic food dyes in school foods. The California School Food Safety Act (AB 2316), signed by Governor Newsom on September 28, 2024, prohibits six synthetic dyes — including Green 3 — from foods sold or served in public schools. The ban takes effect December 31, 2027.

Virginia — HB 1910 / SB 1289 (Signed 2025)

Virginia's companion bills prohibit public elementary and secondary schools from serving lunches containing seven synthetic color additives, including Green 3. These laws take effect July 1, 2027.

Other States with Enacted School Restrictions

By the end of 2025, school food additive restrictions had been enacted in at least eight states: Arizona, Delaware, Louisiana, Tennessee, Texas, Utah, Virginia, and West Virginia. While the specific dyes covered vary by state, Green 3 is included in most bills that target the standard group of six or seven certified color additives.

Federal Legislation

In August 2025, Representative Grace Meng introduced the Ban Harmful Food Dyes Act (H.R. 5027) in the U.S. House of Representatives, which would deem food containing certain color additives adulterated beginning January 1, 2027. As of this writing, the bill has not advanced to a vote.

International Status

European Union — Not Authorized

FD&C Green No. 3 (E143) is not approved for use as a food additive in the European Union. This is a critical distinction from other targeted dyes like Red 40 (E129) and Yellow 5 (E102), which are authorized in the EU with warning labels. While Fast Green FCF has been assigned the E number E143, it was never authorized under Regulation (EC) No. 1333/2008 on food additives, nor was it included in the positive list of permitted colors in the regulation's annexes.

The EU instead permits Green S (E142), a different synthetic green dye, as an alternative. Green S has its own distinct toxicological profile and is not interchangeable with Fast Green FCF from a regulatory perspective.

This means that any food product containing Green 3 is already non-compliant for EU export. Companies with European distribution have never been able to use this dye, which partly explains its limited global commercial footprint.

United Kingdom

Following Brexit, the UK adopted its own food additive framework but has generally maintained alignment with EU restrictions. Green 3 (E143) is not authorized for food use in the UK.

JECFA (Joint FAO/WHO Expert Committee on Food Additives)

Despite its lack of EU authorization, Green 3 has been evaluated favorably by the international food safety body. In its 84th Report (2017), JECFA established an Acceptable Daily Intake (ADI) of 0–25 mg/kg body weight per day for Fast Green FCF. This ADI was based on a long-term rat dietary study that identified a No Observed Adverse Effect Level (NOAEL) of 2,500 mg/kg body weight per day — the highest concentration tested.

JECFA concluded that Fast Green FCF is:

• Not carcinogenic in animal studies
• Not genotoxic based on available evidence
• Of low general toxicity

This favorable safety assessment stands in contrast to FD&C Red No. 3, which was banned under the Delaney Clause due to evidence of carcinogenicity in laboratory rats. IARC classified Green 3 as Group 3 ("not classifiable as to its carcinogenicity to humans") in Supplement 7 (1987), based on inadequate evidence in both humans and animals. It does not appear in the U.S. National Toxicology Program's Report on Carcinogens.

Other Jurisdictions

• Canada: Fast Green FCF is permitted for food use
• Japan: Permitted as Food Green No. 3
• Codex Alimentarius: Listed with the JECFA ADI of 0–25 mg/kg bw/day; included in the General Standard for Food Additives (GSFA) for various food categories
• Australia/New Zealand: Permitted for food use under the Australia New Zealand Food Standards Code (Schedule 15), subject to maximum permitted levels

Affected Product Categories

Green 3's extremely limited use means the number of affected product categories is narrow. Unlike Red 40 (found in thousands of products across dozens of categories) or Yellow 5 (present in everything from beverages to pharmaceuticals), Green 3 appears in a small set of applications where a specific blue-green or teal hue is desired.

Primary Categories

• Candy and confectionery — Green-colored hard candies, gummies, candy coatings, and seasonal confections (particularly around St. Patrick's Day and Christmas). This represents the largest category of Green 3 use.
• Frozen desserts — Select ice creams, sherbets, and popsicles, particularly mint-flavored varieties where a green color is expected.
• Beverages — Some drink mixes, flavored waters, and specialty beverages. Green 3 is occasionally blended with Yellow 5 to achieve specific green shades.
• Baked goods — Limited use in decorated cakes, icings, and seasonal baked items.
• Breakfast cereals — Some colored cereal pieces in multi-colored products.

Secondary Categories

• Dietary supplements — Capsule and tablet coatings where a green color is desired.
• Drugs — Tablet coatings and liquid formulations (not subject to the food phase-out).
• Cosmetics — Eye shadows, nail polishes, and other color cosmetics (not subject to the food phase-out).

Usage Volume Context

To put Green 3's market position in perspective: the FDA certifies batches of all synthetic dyes before commercial use. Green 3 consistently accounts for the smallest volume of any of the seven generally approved FD&C dyes. Red 40, by comparison, dominates certified color usage by a wide margin. This means the aggregate industry reformulation burden for Green 3 is minimal compared to any other dye in the phase-out group.

For most large food manufacturers, Green 3 likely appears in fewer than a handful of SKUs, if any.

What Companies Should Do

Green 3 represents the simplest reformulation challenge of all six dyes targeted in the FDA's voluntary phase-out. Its limited use, narrow product categories, and well-established natural alternatives make the transition straightforward for most affected manufacturers.

1. Audit Current Usage

Begin with a comprehensive ingredient audit across all product lines. Identify every SKU that lists FD&C Green No. 3 (or its lake form) on the ingredient panel. Given Green 3's limited use, many companies will find zero or single-digit affected products.

Check for Green 3 in blended formulations as well. Some products achieve green hues by combining Blue 1 and Yellow 5, but others may use Green 3 directly or in combination. Your color supplier can confirm which formulations contain it.

2. Evaluate Natural Alternatives

Several FDA-approved natural colorants can replace Green 3's blue-green hue:

• Spirulina extract (phycocyanin) — FDA-approved since 2013 for blue and blue-green hues. Suitable for cold, neutral-pH applications. Already widely adopted as a Blue 1 replacement; works well for Green 3 replacement when blended with turmeric or other yellow sources.
• Chlorophyll and chlorophyllin (copper complexes) — Provide direct green coloring. Chlorophyllin copper complex is FDA-listed as exempt from certification (21 CFR 73.125). Note that chlorophyll-based colors are sensitive to heat, light, and pH changes, which may require stability testing.
• Spirulina + turmeric blends — Commercially available pre-blended natural color systems designed as drop-in replacements for synthetic greens.
• Vegetable juice concentrates — Spinach, alfalfa, or other green vegetable juice concentrates can provide green coloring and qualify for "colored with" labeling rather than requiring color additive listing.

3. Prioritize by Channel Exposure

Structure your reformulation timeline based on regulatory exposure:

• School food service products: Highest priority. West Virginia's school ban is already in effect. California's takes effect December 31, 2027. Virginia's takes effect July 1, 2027.
• Products distributed in West Virginia: Monitor the litigation on HB 2354. If the preliminary injunction is lifted, the January 1, 2028, retail ban would apply.
• General retail products: The FDA's voluntary target is end of 2026. While not legally binding, companies that have publicly pledged to remove synthetic dyes face reputational risk for non-compliance.
• EU-export products: Should already be Green 3-free, since E143 was never authorized.

4. Supply Chain Considerations

Given Green 3's minimal volume, natural colorant supply availability is unlikely to be a bottleneck for this specific dye. However, companies reformulating across multiple dyes simultaneously should coordinate with colorant suppliers to ensure adequate supply of spirulina extract and other natural alternatives, which are seeing surging demand industry-wide.

Regulatory Intelligence

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