Blue 1

ColorantsCAS: 3844-45-9

This is what the ingredient is.

Brilliant Blue FCF (Blue 1) is a synthetic blue dye derived from petroleum. One of the few blue colorings approved for food use.

Here is why it shows up on the label.

Artificial blue coloring used alone or mixed with yellow dyes to create green. Common in candy, beverages, baked goods, and ice cream.

Here is what food agencies say.

The FDA has approved it for foods, drugs, cosmetics. Europe sets a suggested daily limit of up to 6 milligrams per kilogram of body weight. It is approved in the US, Europe (as E133), and Canada. Banned in some countries including Norway and France.

Here is what research has found.

Safety reviewed by FDA and EFSA. Generally considered safe with decades of use. Animal studies at high doses showed no significant toxicity. Not well absorbed in the GI tract.

Here are a few things worth knowing.

May cause allergic reactions in individuals sensitive to aspirin or tartrazine. Rare reports of hypersensitivity. Generally well-tolerated by most people.

Sources

  • FDA 21 CFR 74.101
  • EFSA Opinion 2010
  • Food Chemistry Journal 2016

How to read this page

We publish plain facts about this ingredient so a label is easier to read. This is not medical advice, and it is not a recommendation to buy, avoid, or use anything. For a personal health question, talk with a clinician who knows your history.

v1.0Updated 9/12/2026