# Orange B

> Source URL: https://additivefacts.com/additives/orange-b
> Markdown URL: https://additivefacts.com/additives/orange-b.md

**Safety rating:** CAUTION
**CAS number:** 15139-76-1
**Category:** colorant
**FDA GRAS:** no
**Adverse events (FDA AERS):** 0
**FDA recalls:** 0
**Last updated:** 2026-04-02

## Summary

Orange B (CAS 15139-76-1) is a synthetic azo dye used as a food colorant to impart orange hues to food products. It was historically used in limited applications but has been largely phased out in most markets due to regulatory restrictions.

## Regulatory status

| Country | Status |
| --- | --- |
| United States | approved |
| European Union | banned |
| United Kingdom | banned |
| Canada | banned |
| Australia | banned |
| Japan | not_evaluated |
| South Korea | not_evaluated |
| Brazil | not_evaluated |
| China | not_evaluated |
| India | not_evaluated |

## Detailed analysis

## What is Orange B?

Orange B is a synthetic colorant belonging to the azo dye class of food additives. With the CAS number 15139-76-1, it produces an orange color when added to food and beverage products. Like other azo dyes, Orange B contains an azo group (-N=N-) that gives the compound its characteristic color-producing properties. The additive was developed for use in specific food applications where orange coloring was desired without relying on natural colorant sources.

## Common Uses

Historically, Orange B was primarily used in the United States to color limited food products, particularly in certain processed foods and beverages. The FDA previously approved Orange B for specific uses at regulated levels, with particular applications in certain sausage casings and other processed meat products. However, the use of Orange B in food has become increasingly limited over the past several decades, and it is rarely found in modern food products in most developed markets. Many manufacturers have reformulated products to use alternative colorants that face fewer regulatory restrictions.

## Safety Assessment

The FDA database contains no reported adverse events associated with Orange B consumption, and no recalls have been issued for products containing this colorant. This lack of adverse event reports reflects both the limited historical use of the additive and the absence of documented safety incidents in the available regulatory records.

Concerns about azo dyes in general have driven regulatory decisions regarding Orange B. Some azo dyes can be metabolized by gut bacteria into aromatic amines, compounds that have raised toxicological concerns in animal studies. This class-level concern, rather than specific evidence of harm from Orange B itself, has influenced regulatory approaches to azo dyes. The additive underwent safety review processes typical for food colorants, but the regulatory landscape for synthetic dyes has become increasingly restrictive over time.

## Regulatory Status

Orange B is not designated as Generally Recognized as Safe (GRAS) by the FDA. In the United States, the colorant was previously listed as an approved color additive under the Federal Food, Drug, and Cosmetic Act, but its permitted uses have been restricted or discontinued. The additive is not approved for use in the European Union, where regulations governing synthetic food colorants are particularly strict. Many other countries have similarly restricted or banned Orange B in food applications.

The current regulatory status reflects a broader trend in food safety policy toward limiting synthetic azo dyes in favor of naturally derived colorants or alternative synthetic options with more extensive safety documentation. Manufacturers seeking orange coloration in food products typically now use alternatives such as beta-carotene, annatto, or other approved colorants.

## Key Studies

Specific published safety studies focused exclusively on Orange B are limited in the available scientific literature. Safety assessment of Orange B was conducted during its regulatory approval period using standard toxicological protocols available at that time. Most contemporary research on azo dyes focuses on the general class of compounds rather than individual dyes like Orange B.

The regulatory decisions affecting Orange B and similar colorants have been informed by precautionary approaches adopted by food safety agencies, particularly the FDA and EFSA, which emphasize maintaining approved colorant lists based on current scientific understanding and public health priorities. As synthetic dye technology has advanced, newer colorants with more comprehensive safety data have become available, contributing to the decline in Orange B use.

## Sources

- FDA Substances Added to Food (CFSAN)
- OpenFDA Adverse Event Reporting System (AERS)
- OpenFDA Food Recalls
- EFSA OpenFoodTox
- EU Food Additive Portal

## Citation

Additive Facts. "Orange B — Safety, regulation, and evidence." https://additivefacts.com/additives/orange-b. Accessed 2026-05-19.