# Poly(divinylbenzene-co-ethylstyrene)

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**Safety rating:** UNKNOWN
**CAS number:** 9043-77-0
**Category:** solvent
**FDA GRAS:** no
**Adverse events (FDA AERS):** 0
**FDA recalls:** 0
**Last updated:** 2026-04-04

## Summary

Poly(divinylbenzene-co-ethylstyrene) is a synthetic polymer used as a solvent and vehicle in food applications. This copolymer compound serves functional roles in food processing and formulation where solvent properties are required.

## 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 Poly(divinylbenzene-co-ethylstyrene)?

Poly(divinylbenzene-co-ethylstyrene), identified by CAS Number 9043-77-0, is a synthetic copolymer composed of divinylbenzene and ethylstyrene monomers. The polymer is created through the polymerization of these two aromatic vinyl compounds, resulting in a crosslinked resinous material. This additive belongs to the broader class of polymeric solvents and vehicles used in food manufacturing and formulation.

## Common Uses

This copolymer functions primarily as a solvent or vehicle in food applications. Solvents and vehicles in food are utilized to dissolve, suspend, or carry other food ingredients, flavorings, colorants, or functional components. The polymeric nature of this compound allows it to interact with various food matrices while maintaining stability during processing and storage. Its use is typically limited to specific technical applications where conventional solvents may be inadequate.

## Safety Assessment

Poly(divinylbenzene-co-ethylstyrene) has not been designated as Generally Recognized as Safe (GRAS) by the FDA. However, the absence of a GRAS designation does not indicate the substance is unsafe; rather, it reflects that formal GRAS review or approval through other regulatory pathways has not been completed. According to FDA records, there are zero reported adverse events associated with this additive and zero documented recalls involving this substance. This lack of reported incidents suggests no significant acute safety concerns have emerged from its use.

The limited public health data on this specific copolymer reflects its specialized industrial application in food processing. As a high-molecular-weight polymer, it is unlikely to be systemically absorbed in the gastrointestinal tract, which may reduce toxicological concerns associated with smaller molecular weight solvents. However, comprehensive safety studies specific to this compound's food applications would be necessary to establish definitive safety conclusions.

## Regulatory Status

The regulatory status of Poly(divinylbenzene-co-ethylstyrene) varies by jurisdiction. In the United States, it is not explicitly listed as approved for direct food additive use without prior FDA authorization or GRAS status. It may be approved for use in food contact materials or indirect food applications under specific regulations. The European Food Safety Authority (EFSA) maintains separate approval lists for food additives; this compound's status in the EU food additive approval system should be verified against current EU Regulation 1333/2008.

Manufacturers intending to use this substance in food products would typically need to either obtain GRAS recognition, submit a Food Additive Petition (FAP) to the FDA, or demonstrate compliance with existing regulations for food contact substances. Its use is likely restricted to applications where alternative solvents are unsuitable or where it provides specific technical advantages.

## Key Studies

Publicly available peer-reviewed literature specific to Poly(divinylbenzene-co-ethylstyrene) in food applications is limited. Most published research on this polymer relates to its non-food industrial applications, such as chromatography resins and ion-exchange materials. These studies generally demonstrate the chemical stability and inertness of the polymer backbone under various conditions. Any food safety assessment would require manufacturer-sponsored toxicological studies, including acute toxicity data, repeated-dose toxicity studies, and potential migration studies from food contact materials, depending on the intended application.

## 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. "Poly(divinylbenzene-co-ethylstyrene) — Safety, regulation, and evidence." https://additivefacts.com/additives/poly-divinylbenzene-co-ethylstyrene. Accessed 2026-05-20.