# Isoamyl Acetoacetate

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**Safety rating:** UNKNOWN
**CAS number:** 2308-18-1
**Category:** flavoring
**FDA GRAS:** no
**Adverse events (FDA AERS):** 0
**FDA recalls:** 0
**Last updated:** 2026-04-02

## Summary

Isoamyl acetoacetate is a synthetic flavoring compound used to impart fruity, banana-like notes to food and beverage products. It is not currently approved by the FDA as a Generally Recognized as Safe (GRAS) substance, though it has no documented adverse events or recalls associated with its use.

## 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 Isoamyl Acetoacetate?

Isoamyl acetoacetate (CAS Number 2308-18-1) is a synthetic organic compound belonging to the ester class of chemicals. It is characterized by a fruity aroma with prominent banana and apple-like notes, making it valuable in the flavor industry. The compound is chemically derived from acetoacetic acid and isoamyl alcohol through esterification reactions. As a synthetic flavoring agent, it does not occur naturally in significant quantities in food sources.

## Common Uses

Isoamyl acetoacetate is primarily used as a flavoring agent in the food and beverage industry. Its applications include:

- Confectionery products, particularly candies and gums where fruity notes are desired
- Beverage flavoring, especially in fruit-flavored drinks and soft drinks
- Baked goods and desserts requiring enhanced fruit flavoring profiles
- Dairy products such as yogurts and flavored milk drinks
- Ice cream and frozen desserts

The compound functions at very low concentrations (typically parts per million) to achieve desired flavor profiles. Food manufacturers select this ingredient for its stability and ability to deliver consistent fruity flavor characteristics in various food matrices.

## Safety Assessment

Isoamyl acetoacetate has generated no documented adverse events or product recalls in FDA records. This absence of reported safety incidents suggests that, in typical food applications at flavoring concentrations, the compound has not raised immediate safety concerns among consumers or regulatory agencies.

As a synthetic ester, isoamyl acetoacetate is metabolized similarly to other ester compounds in the body. The primary metabolic pathway involves hydrolysis to its component parts—acetoacetic acid and isoamyl alcohol—which can be further metabolized through normal biochemical pathways. The low concentrations used in flavoring applications (typically less than 50 ppm in final food products) result in minimal systemic exposure.

However, it is important to note that the absence of adverse events does not constitute formal FDA approval or a GRAS designation. The compound's safety profile has not undergone the comprehensive review process required for GRAS status, which involves evaluation of published scientific literature, toxicological studies, and expert panel assessment.

## Regulatory Status

Isoamyl acetoacetate is not currently listed on the FDA's GRAS (Generally Recognized as Safe) inventory. This means the compound has not received formal FDA recognition as safe for its intended use through the standard GRAS notification process. However, this regulatory classification does not automatically indicate danger; rather, it reflects that formal approval procedures have not been completed or pursued.

The compound may be used in certain jurisdictions under different regulatory frameworks. In the European Union, flavor regulations are governed by EU Regulation 1334/2008, which maintains its own lists of approved flavoring substances. International regulatory agencies, including those in Canada, Japan, and Australia, maintain separate flavor ingredient approval lists based on their own risk assessment protocols.

Manufacturers using isoamyl acetoacetate should verify its regulatory status in their specific jurisdiction and confirm compliance with applicable food additive regulations.

## Key Studies

Limited peer-reviewed literature specifically addresses isoamyl acetoacetate toxicology. The compound belongs to a broader class of short-chain esters, some of which have been evaluated by the International Organization of the Flavor Industry (IOFI) and the Flavor and Extract Manufacturers' Association (FEMA). Safety evaluations of chemically similar compounds suggest that short-chain esters are generally metabolized rapidly and do not bioaccumulate.

The absence of specific chronic toxicity, genotoxicity, or reproductive toxicity studies on isoamyl acetoacetate itself represents a gap in the published literature. Comprehensive safety assessment would typically include these standard toxicological test protocols as part of GRAS determination procedures.

Further research and formal safety dossier preparation would be necessary to support potential GRAS status or inclusion on regulatory approval lists in jurisdictions where it is not currently permitted.

## 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. "Isoamyl Acetoacetate — Safety, regulation, and evidence." https://additivefacts.com/additives/isoamyl-acetoacetate. Accessed 2026-05-19.