# Hexyl Isothiocyanate

> Source URL: https://additivefacts.com/additives/hexyl-isothiocyanate
> Markdown URL: https://additivefacts.com/additives/hexyl-isothiocyanate.md

**Safety rating:** UNKNOWN
**CAS number:** 6803-40-3
**Category:** flavoring
**FDA GRAS:** no
**Adverse events (FDA AERS):** 0
**FDA recalls:** 0
**Last updated:** 2026-04-02

## Summary

Hexyl isothiocyanate (CAS 6803-40-3) is a naturally occurring organic compound belonging to the isothiocyanate family, used as a flavoring agent in food products. It contributes pungent, mustard-like aromatic qualities to foods and beverages.

## 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 Hexyl Isothiocyanate?

Hexyl isothiocyanate is an organic compound with the molecular formula C7H13NS. It belongs to the isothiocyanate family, a class of naturally occurring substances found in cruciferous vegetables such as mustard, radish, and horseradish. The compound is characterized by its pungent odor and sharp, spicy flavor profile, making it useful as a flavoring agent in the food industry.

The chemical structure of hexyl isothiocyanate consists of a hexyl chain attached to an isothiocyanate functional group (-N=C=S). This functional group is responsible for the compound's distinctive sensory properties and reactivity in food systems.

## Common Uses

Hexyl isothiocyanate is used primarily as a flavoring agent and flavoring adjuvant in food products. Its applications include:

- Condiment and sauce formulations, particularly in mustard-based products
- Processed meat flavoring systems
- Snack food seasonings
- Savory beverage flavoring
- Spice blends and dry seasonings

The compound is employed in small quantities to provide pungent, spicy notes characteristic of traditional mustard and horseradish preparations. As a flavoring adjuvant, it may also enhance or modify the sensory characteristics of other ingredients in multi-component flavoring systems.

## Safety Assessment

Hexyl isothiocyanate has not been formally listed as Generally Recognized As Safe (GRAS) by the FDA, meaning it does not have official GRAS affirmation. However, the FDA adverse events database contains zero reported adverse events associated with this additive, and there are no documented recalls linked to hexyl isothiocyanate.

As a naturally occurring compound found in common food plants, hexyl isothiocyanate shares chemical characteristics with other isothiocyanates that have been studied for potential health effects. Isothiocyanates in general have been the subject of scientific research investigating both potential protective compounds and irritant properties at high concentrations.

The lack of reported adverse events and recalls suggests that current use levels in food products have not resulted in documented safety concerns in the consumer population. However, the absence of GRAS status indicates that regulatory approval pathways for specific food applications may require additional documentation or may be handled through food additive petition processes on a case-by-case basis.

## Regulatory Status

In the United States, hexyl isothiocyanate does not have FDA GRAS affirmation. This means that manufacturers using this ingredient must either have specific FDA approval as a food additive or rely on prior sanction status, or demonstrate that use is consistent with applicable food regulations.

The regulatory treatment of isothiocyanates and similar flavoring compounds varies internationally. In the European Union, flavoring substances are regulated under specific guidelines, and individual isothiocyanates may be evaluated separately for authorization in food use.

Manufacturers seeking to use hexyl isothiocyanate in food products should verify current regulatory requirements in their specific jurisdictions and food applications, as regulations may change or vary based on intended use and product category.

## Key Studies

Scientific literature on hexyl isothiocyanate specifically is limited compared to research on other isothiocyanates found in cruciferous vegetables. Most research has focused on:

- General properties of isothiocyanate compounds and their occurrence in plant-based foods
- Sensory evaluation and flavor chemistry of pungent compounds
- Structure-activity relationships in isothiocyanate chemistry
- Comparative studies of various isothiocyanates from different plant sources

Research on related isothiocyanates has examined both potential bioactive properties and irritant characteristics at various concentration levels. However, specific toxicological studies on hexyl isothiocyanate at food-use concentrations appear limited in the published scientific literature.

Further research may be beneficial to establish comprehensive safety data at intended food use levels, which could support potential GRAS affirmation or regulatory approval pathways in various jurisdictions.

## 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. "Hexyl Isothiocyanate — Safety, regulation, and evidence." https://additivefacts.com/additives/hexyl-isothiocyanate. Accessed 2026-05-19.