# 2-pentylthiazole

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> Markdown URL: https://additivefacts.com/additives/2-pentylthiazole.md

**Safety rating:** UNKNOWN
**CAS number:** 37645-62-8
**Category:** flavoring
**FDA GRAS:** no
**Adverse events (FDA AERS):** 0
**FDA recalls:** 0
**Last updated:** 2026-04-02

## Summary

2-pentylthiazole is a synthetic flavoring compound used to impart meat-like, savory, and roasted notes in food products. It is not approved as a food additive by the FDA but may be used in certain jurisdictions under different regulatory frameworks.

## 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 2-pentylthiazole?

2-pentylthiazole (CAS Number: 37645-62-8) is a synthetic organic compound belonging to the thiazole family of chemicals. It is a volatile heterocyclic compound containing sulfur and nitrogen in its ring structure. This colorless to pale yellow liquid is primarily recognized for its sensory properties rather than its nutritional value.

## Common Uses

2-pentylthiazole is used in the food industry as a flavoring agent and flavor adjuvant. Its primary applications include:

- **Meat flavoring**: It provides savory, meaty, and umami-like characteristics to processed meat products, broths, and meat-based seasonings
- **Roasted notes**: The compound contributes roasted and toasted flavor profiles to snacks, savory baked goods, and seasonings
- **Flavor enhancement**: It may be used in combination with other flavor compounds to create complex savory profiles in soups, sauces, and ready-to-eat meals

The compound is particularly valued in the flavor industry for creating authentic meat-like sensations in vegetarian products, plant-based meat alternatives, and processed food applications.

## Safety Assessment

According to FDA records, there have been zero reported adverse events associated with 2-pentylthiazole and zero food recalls linked to this additive. The absence of adverse event reports does not constitute formal FDA approval or a determination of safety, but indicates no documented safety concerns have been raised through FDA's monitoring systems.

The chemical structure of thiazoles, including 2-pentylthiazole, has been studied in the context of flavor chemistry. The compound occurs naturally in small quantities in cooked meat and certain foods, which has informed its use as a synthetic flavoring to recreate these natural flavor profiles.

As with most synthetic flavoring compounds used in small quantities, exposure levels in food are typically very limited. The volatile nature of 2-pentylthiazole means it contributes primarily to aroma rather than being present in large residual amounts in finished food products.

## Regulatory Status

2-pentylthiazole is **not approved** as a food additive by the FDA and does not possess GRAS (Generally Recognized as Safe) status in the United States. This means it cannot be legally added to food products intended for the U.S. market without specific FDA approval.

The regulatory status may differ in other jurisdictions. Some countries or regional bodies like the European Union may have different approval processes and lists of permitted flavorings. Food manufacturers should verify the regulatory status in their specific target markets before using this compound.

Regulatory bodies typically evaluate flavor compounds based on intended use level, exposure assessment, and available toxicological data. The lack of FDA approval for this particular compound may reflect the application timeline, the specific data package submitted, or the manufacturer's decision not to pursue U.S. market approval.

## Key Studies

Scientific literature on 2-pentylthiazole is limited compared to more widely approved food additives. Most information comes from:

- **Flavor chemistry research**: Studies examining thiazole compounds in thermal food processing, particularly the formation of meat-like flavors during cooking
- **Sensory science**: Research on how thiazole compounds contribute to perceived flavor in food products
- **FEMA GRAS assessments**: The Flavor and Extract Manufacturers Association maintains scientific databases on flavor compound safety, though 2-pentylthiazole's status varies by region

The general toxicology of thiazole-based compounds has been evaluated, but specific long-term safety studies on 2-pentylthiazole as a food additive appear limited in the published scientific literature. Manufacturers and regulatory bodies would typically require such data to support an approval application.

As with all synthetic flavor compounds, the key safety principle involves intended use level—flavoring compounds are used in very small quantities (typically parts per million), which significantly limits actual dietary exposure.

## 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. "2-pentylthiazole — Safety, regulation, and evidence." https://additivefacts.com/additives/2-pentylthiazole. Accessed 2026-05-19.