The Delaney Clause tells FDA it cannot approve a food additive, or list a color additive, that has been shown to cause cancer in people or animals. It is a yes-or-no bar. It is not the test FDA uses for every other kind of harm. Shehadeh Giannamore, PLLC reviews food formulas for whether an ingredient is an approved food additive, a listed color, or generally recognized as safe for that use.
The name covers two laws, not one sentence. The Food Additives Amendment of 1958 put the bar on food additives. The Color Additive Amendments of 1960 put a matching bar on color additives. A pesticide residue is no longer judged under this clause. FDA’s own milestone list says the Food Quality Protection Act of 1996 ended that application.
What the Delaney Clause says
Representative James Delaney held hearings in the 1950s on chemicals in food. FDA’s history of color additives ties those hearings, and illnesses from an orange candy colored with FD&C Orange No. 1, to the later color law. The food-additive statute came first.
FDA describes the 1958 proviso in plain terms. It prohibits the approval of any food additive shown to induce cancer in humans or animals. The 1960 color proviso prohibits the approval of any color additive shown to induce cancer in humans or animals. FDA quotes the color clause this way. A color additive shall be deemed unsafe if it is found to induce cancer when ingested by a person or an animal, or after other relevant exposure of a person or an animal to that additive.
“Induce cancer” is the trigger. The clause does not ask whether the dose in the study looks like a serving of food. It does not ask FDA to decide that the finding is unimportant because a different species did not show it. If the finding is there, FDA does not approve that use.
The clause is about approval and listing. It is not a recall button that fires the day a paper is published. FDA acts through the petition, the regulation, or an order that revokes a listing. Objections and a hearing can follow an order. The ingredient does not become unlawful in every product category on the morning the study hits the news.
How this differs from the food additive safety standard
The everyday test is different. FDA’s safety standard for a food additive, and for a GRAS use, is a reasonable certainty of no harm under the intended conditions of use. Congress did not require proof that harm is impossible. FDA has said safety is a reasonable certainty in the minds of competent scientists that the substance is not harmful under those conditions. That definition is in 21 CFR 170.3(i).
For food additives, FDA also applies a safety factor when it moves from animal data to people. Unless different evidence justifies another factor, the factor is 100 to 1. A tolerance for people will not sit above 1/100th of the largest amount shown not to harm the test animals. That rule is in 21 CFR 170.22, and the Code of Federal Regulations text checked for this article was current as of September 25, 2026.
Read the two tests side by side. Reasonable certainty of no harm can be met with a margin, a lower use level, or limits on which foods may carry the additive. The Delaney Clause does not offer that margin once the cancer finding is made. A high dose in male rats is still a finding. FDA said exactly that about FD&C Red No. 3. The agency said the data do not show cancer in people, and it still revoked the food and ingested-drug uses because of the clause.
| Question | General safety standard | Delaney Clause |
| What it covers | Harm under the intended use | Cancer in people or animals |
| How a use can still go forward | Reasonable certainty of no harm, often with a safety factor | It cannot, if the cancer finding is made |
| Where it lives | Food additive approval and the GRAS standard | 1958 food-additive proviso and 1960 color-additive proviso |
| What FDA publishes | A regulation that names the use | A denial, or an order taking the use off the list |
Food additives and color additives are not the same filing
A food additive is a substance that becomes a component of food, or affects food, and is not GRAS for that use and is not otherwise excluded. The 1958 amendment required a premarket showing of safety for new food additives. FDA issues a regulation when it approves a use. The regulation is the approval. It names the foods and the conditions.
A color additive has its own definition and its own petition. FDA’s color history says only colors listed as suitable and safe for a given use may be used in foods, drugs, cosmetics, and certain devices, with an exception for coal-tar hair dyes. There is no GRAS exclusion in the color-additive definition. A substance that both flavors and colors can raise both questions.
The 1960 law put about 200 colors then in use on a provisional list until FDA permanently listed them or dropped them. FDA says about half of those colors remain listed. Lakes are the colors FDA has described as still provisional, with work underway to list them permanently. A provisional color is not a free pass, and a permanent listing is not a promise that a later cancer study will be ignored.
FD&C Red No. 3 is the current public example of the color clause. FDA’s page on that color, current as of October 5, 2026, says the agency is revoking the food and ingested-drug authorizations under the Delaney Clause. Orders are dated January 16, 2025 and August 5, 2026. Food manufacturers have until January 15, 2027 to reformulate. Ingested-drug manufacturers have until January 18, 2028. Product made before the applicable date can remain on the market after it. FDA also says studies in people did not show the rat finding. The clause still applies.
Where the clause does not apply
Pesticide residues in food are outside this clause. FDA’s milestone list says the Food Quality Protection Act amended the Food, Drug, and Cosmetic Act and eliminated application of the Delaney proviso to pesticides. A residue question is a tolerance question under that later law, not a 1958 food-additive petition.
Animal drugs and animal feed additives were carved out of the proviso in 1962. FDA’s milestone list states that exemption. This article does not restate the animal-drug rules. If your product is a drug for animals or a feed additive, do not use the human-food clause as the answer.
A GRAS use is not approved under the food-additive petition, so the proviso is not the document FDA signs. The safety bar is still the same reasonable certainty of no harm, and the data still have to be public enough for expert consensus. A use that induces cancer will not meet that consensus. Calling the file “GRAS” does not move it out from under the science.
Dietary supplements are a different statute for new dietary ingredients. Do not assume a food-additive Delaney analysis answers a supplement ingredient. Color in a supplement can still be a color-additive problem.
A ban can also happen without the Delaney Clause
Losing a use is not proof that the Delaney Clause was the reason. FDA can decide that experts no longer recognize a use as safe. The ingredient then falls back into food-additive status and needs an approval it does not have. That is a GRAS decision. It is the general safety standard, not the cancer proviso.
Partially hydrogenated oils are the example on this site. FDA’s first public step was a tentative finding that those oils were not GRAS. FDA acts to ban trans fat in foods covers that 2013 notice. It is not a Delaney order.
FDA later made a final determination and set a compliance date in June 2018 for removing those oils. FDA bans trans fats walks through that order. The June 2018 date is a GRAS date. It is not a date under the Delaney Clause, and it is not the date for any color additive.
The practical likeness is the work after the order. You still reformulate, you still change the ingredient line, and you still track what was manufactured before the cutoff. The legal reason matters because the next ingredient may not be cancer, and may not be a color. Read the order before you borrow the deadline from a different substance.
What to check if a study or an order names your additive
Start with the identity. Is the substance in the study the substance in your spec, including the form and the impurities? A finding about a different salt or a contaminant is not automatically a finding about your ingredient.
Then the legal box. Food additive, color additive, GRAS use, pesticide residue, animal drug, or dietary ingredient. The clause you read has to match the box. A color listing and a food-additive regulation can both exist for related uses, with different dates.
Then the use. The regulation or the order names foods, levels, and product types. A revocation for ingested drugs does not, by itself, set the food date. A revocation for food does not, by itself, answer a topical product. Write the use in one sentence and match the order to that sentence.
An FDA ingredient review is where that match is made before you print the next label or ship the next lot.
Keep the manufacturing records. When FDA phases a use out, product made before the effective date is often still lawful to sell. You cannot use that allowance if you cannot show the date the batch was made. Imported lots use the U.S. date, not the date the foreign plant prefers.
Questions about the clause and your additive
What is the Delaney Clause?
It is the proviso that bars FDA from approving a food additive, or listing a color additive, shown to induce cancer in people or animals. The food version is in the Food Additives Amendment of 1958. The color version is in the Color Additive Amendments of 1960.
Is it the same thing as the food additive safety standard?
No. The general standard is a reasonable certainty of no harm under the intended use. FDA can apply a safety factor, including the 100-to-1 factor in 21 CFR 170.22. The Delaney Clause does not allow that kind of margin once cancer is shown.
Does the clause apply to pesticide residues?
Not since the Food Quality Protection Act of 1996. FDA’s milestone history says that law eliminated application of the Delaney proviso to pesticides.
Did the trans fat decision use the Delaney Clause?
No. FDA removed the GRAS status of partially hydrogenated oils. That is the general safety standard. The June 2018 compliance date on the firm’s trans fat posts is not a Delaney date.
Why did FDA act on Red No. 3 if it says people were not shown to get cancer?
Because the color clause treats a finding of cancer in animals as enough. FDA says the rat finding came through a hormonal mechanism, that human studies did not show the same effect, and that the clause still required the agency to revoke the food and ingested-drug uses.
Does a GRAS conclusion avoid the clause?
The proviso is written for food-additive approvals and color listings. A GRAS use still has to meet reasonable certainty of no harm, with public data and expert consensus. A cancer finding is not a use experts can honestly recognize as safe.
Match the order to the use before you reformulate
The Delaney Clause is a limit on FDA approval when cancer is shown. The food additive safety standard is the broader test for harm. Your additive is affected only when the finding and the legal category match the way you use it. If you want that match checked against the current regulation, contact the firm with the ingredient name, the food, and the level.
This article is general information, not legal advice. Reading it does not create an attorney-client relationship. Orders and listings change. Read the current regulation before you set a production date.