# Epichlorohydrin Crosslinked With Ammonia

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**Safety rating:** UNKNOWN
**CAS number:** 28551-14-6
**Category:** other
**FDA GRAS:** no
**Adverse events (FDA AERS):** 0
**FDA recalls:** 0
**Last updated:** 2026-04-02

## Summary

Epichlorohydrin crosslinked with ammonia is a processing aid used in food manufacturing, primarily in ion exchange resins for water treatment and food processing applications. It is not approved as a food additive by the FDA and is not classified as GRAS (Generally Recognized as Safe).

## Regulatory status

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

## Detailed analysis

## What is Epichlorohydrin Crosslinked With Ammonia?

Epichlorohydrin crosslinked with ammonia (CAS Number 28551-14-6) is a synthetic polymer formed through the reaction of epichlorohydrin with ammonia. Epichlorohydrin is a chemical compound commonly used in industrial applications, and when crosslinked with ammonia, it creates a polymeric structure used primarily as a processing aid in food manufacturing. This compound does not serve as a direct food ingredient but rather functions in the background of food production processes.

## Common Uses

This substance is primarily used in the creation of ion exchange resins employed in food processing and water treatment applications. Ion exchange resins are used to remove unwanted minerals, ions, and impurities from water and food liquids during production. The crosslinked polymer structure allows these resins to selectively bind and remove specific contaminants while allowing desirable components to pass through. Applications may include:

- Water purification in beverage manufacturing
- Removal of heavy metals from processed foods
- Decolorization of food products
- pH adjustment in food processing systems

As a processing aid, any residual amounts would theoretically be removed or rendered inert during final food preparation, though complete removal cannot always be guaranteed.

## Safety Assessment

The FDA has not approved epichlorohydrin crosslinked with ammonia as a food additive, nor is it recognized as GRAS. This classification means it has not undergone the standard FDA approval process for direct food additives. However, it is important to note that processing aids sometimes operate under different regulatory frameworks than direct additives, particularly if manufacturers can demonstrate that the substance is removed during processing or that residual levels are negligible and pose no safety concern.

According to FDA records, there have been zero reported adverse events and zero recalls associated with this substance, suggesting it has not been identified as causing consumer harm based on available surveillance data. The absence of adverse event reports does not necessarily indicate the substance has been comprehensively studied for safety, but rather indicates no incidents have been formally reported and linked to this specific compound.

Epichlorohydrin itself is classified as a hazardous substance by occupational safety agencies due to potential mutagenic and reproductive effects at high exposure levels. However, the crosslinked polymer form and typical food processing applications involve significantly different exposure scenarios than occupational chemical handling. The polymer structure may substantially alter the bioavailability and reactivity of the parent compound.

## Regulatory Status

In the United States, this substance is not listed on the FDA's inventory of food additives approved for use in foods. It does not have GRAS status, meaning manufacturers cannot legally use it as an intentional food additive. However, it may be permitted in specific processing applications if it can be demonstrated that it meets the definition of a processing aid under FDA regulations—meaning it is used in food manufacturing but is not intended to be present in the final food product or is present only in insignificant amounts.

The European Food Safety Authority (EFSA) has not published a specific assessment for this crosslinked polymer in their food additive database. International regulatory approaches to this substance may vary.

## Key Studies

Limited published scientific literature is available specifically addressing epichlorohydrin crosslinked with ammonia in food applications. Most relevant research focuses on the parent compound epichlorohydrin and its general toxicological properties, or on ion exchange resins more broadly as processing aids. The crosslinked polymer form represents a distinct chemical entity from the parent compound and may have substantially different safety properties.

Manufacturers using this substance in food processing would be responsible for maintaining documentation supporting its safety and compliance with FDA processing aid regulations. Consumers seeking detailed safety information should contact food manufacturers directly regarding its use in specific products.

## 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. "Epichlorohydrin Crosslinked With Ammonia — Safety, regulation, and evidence." https://additivefacts.com/additives/epichlorohydrin-crosslinked-with-ammonia. Accessed 2026-05-12.