Is this for you at all
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On this page8
What this covers
Food coloring, cake decor, sprinkles, edible glitter, specialty flour and sugar, cocoa, baking powder and yeast. Nine leaves, grouped because they are dry and jarred, answering to the same body of food labeling law.
Four of them are colorants
Which changes the shape of the problem. A color additive is lawful for a use because it is listed for that use in parts 73, 74 or 82, and 21 CFR 101.22(k) decides how it must then be declared. That is the section this property leads with.
The first shorthand with a limit
"Artificial Color" is permitted only for colors not subject to certification and not otherwise required to be named. A certified color has to be declared by its listed name, with "Lake" included where it is a lake, as in Blue 1 Lake.
The second
A chemical preservative is declared by its common or usual name and by a separate description of its function. The rule gives the forms: preservative, to retard spoilage, a mold inhibitor, to help protect flavor, to promote color retention. The name alone is not enough.
The third, and the sharpest
A flavoring, coloring or incidental additive that contains a major food allergen is subject to allergen labeling notwithstanding any other law. So "natural flavors" and "artificial color" do not shield what is inside them.
And wheat is on the list of nine
Milk, egg, fish, Crustacean shellfish, tree nuts, wheat, peanuts, soybeans and sesame. In a baking category wheat reaches almost everything, and sesame was the most recent addition.
None of this is about the jar
Which is worth saying plainly. The container section here is measured and useful, and the reason this property exists is that the hard decisions are composition decisions made before anything is filled.