# Sulfiting Agents

> Source URL: https://additivefacts.com/additives/sulfiting-agents
> Markdown URL: https://additivefacts.com/additives/sulfiting-agents.md

**Safety rating:** SAFE
**CAS number:** 977116-60-1
**Category:** antioxidant
**FDA GRAS:** yes
**Adverse events (FDA AERS):** 0
**FDA recalls:** 0
**Last updated:** 2026-04-04

## Summary

Sulfiting agents are a group of chemical compounds containing sulfite that function as antioxidants and preservatives in food. They prevent oxidation and microbial spoilage, commonly used in dried fruits, wines, and processed foods to extend shelf life.

## Regulatory status

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

## Detailed analysis

## What is Sulfiting Agents?

Sulfiting agents are food additives containing sulfite compounds, including sodium sulfite, potassium sulfite, sodium bisulfite, potassium bisulfite, sodium metabisulfite, and potassium metabisulfite. These compounds work by donating sulfur dioxide (SO2) in food, which acts as an antioxidant and antimicrobial agent. The FDA recognizes sulfiting agents as Generally Recognized as Safe (GRAS) for their intended uses in food production.

## Common Uses

Sulfiting agents are widely used across multiple food categories. They are particularly prevalent in dried fruits such as raisins, apricots, and cranberries, where they prevent browning and preserve color and texture. Wine and beer production relies heavily on sulfiting agents for preventing oxidation and controlling fermentation. Other common applications include:

- Processed seafood and shrimp
- Fruit juices and concentrates
- Jams and jellies
- Dehydrated potatoes
- Corn syrup
- Baked goods
- Condiments and sauces

These applications leverage the compounds' dual function as both preservatives and color stabilizers, extending product shelf life while maintaining visual appeal.

## Safety Assessment

Sulfiting agents have been extensively studied for safety. The FDA has received zero adverse event reports associated with sulfiting agents and has documented zero recalls specifically attributable to these compounds. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) and the European Food Safety Authority (EFSA) have both evaluated sulfites and established acceptable intake levels.

The primary concern historically associated with sulfites involves individuals with sulfite sensitivity, particularly some asthmatics. This led the FDA to establish mandatory labeling requirements for sulfite-containing foods in 1986. Any food containing more than 10 parts per million (ppm) of sulfites must declare their presence on the label. This regulatory measure enables consumers with known sensitivities to avoid these products.

For the general population without sulfite sensitivity, sulfiting agents are considered safe at levels used in food production. The compounds are metabolized in the body and do not accumulate in tissues.

## Regulatory Status

Sulfiting agents hold GRAS status with the FDA and are approved for use as direct additives in numerous food categories. Specific usage levels and applications are regulated under Title 21 of the Code of Federal Regulations (CFR).

International regulatory bodies also permit sulfiting agents:
- The European Union approves sulfites (E220-E228) as food additives with specified maximum levels
- JECFA lists sulfites as acceptable food additives
- Many other countries permit their use with appropriate labeling

The FDA requires clear labeling of sulfite content to protect sensitive populations, making these additives among the most transparently regulated food compounds.

## Key Studies

Research on sulfiting agents has consistently supported their safety profile. Studies examining sulfite metabolism demonstrate that humans metabolize these compounds efficiently, with rapid conversion and excretion. Research on asthmatics with sulfite sensitivity has established clear diagnostic criteria and reaction thresholds, leading to evidence-based regulatory protections.

The low adverse event and recall rates associated with sulfiting agents reflect both their safety profile and the regulatory framework governing their use. Their long history of safe use—particularly in wine production spanning centuries—combined with modern safety assessments, supports their GRAS designation.

For individuals without known sulfite sensitivity, sulfiting agents represent a well-established, safe method of preserving food quality and extending shelf life.

## Brands using Sulfiting Agents

- Chex mix (1 product)
- KEN'S (1 product)

## 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. "Sulfiting Agents — Safety, regulation, and evidence." https://additivefacts.com/additives/sulfiting-agents. Accessed 2026-05-20.