# 2-methyl-1-methylthio-2-butene

> Source URL: https://additivefacts.com/additives/2-methyl-1-methylthio-2-butene
> Markdown URL: https://additivefacts.com/additives/2-methyl-1-methylthio-2-butene.md

**Safety rating:** UNKNOWN
**CAS number:** 89534-74-7
**Category:** flavoring
**FDA GRAS:** no
**Adverse events (FDA AERS):** 0
**FDA recalls:** 0
**Last updated:** 2026-04-02

## Summary

2-methyl-1-methylthio-2-butene is a synthetic flavoring compound used to impart sulfurous and savory notes in food products. This organosulfur compound is employed in small quantities as a flavoring agent or adjuvant in various processed foods.

## 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-methyl-1-methylthio-2-butene?

2-methyl-1-methylthio-2-butene (CAS Number: 89534-74-7) is a synthetic organic compound belonging to the class of organosulfur flavor compounds. It contains both a branched butene structure and a methylthio (sulfur-containing) functional group, which are responsible for its characteristic sulfurous and savory organoleptic properties. This compound is classified as a flavoring agent or flavor adjuvant, meaning it is used to enhance or modify the taste and aroma profile of food products rather than provide nutritional value.

## Common Uses

As a synthetic flavoring compound, 2-methyl-1-methylthio-2-butene is used in the food industry to create or enhance savory, meaty, and sulfurous notes in processed foods. Such compounds are typically employed in very small concentrations—often measured in parts per million (ppm)—due to their potent flavor characteristics. Common applications include flavoring systems for savory snacks, processed meat products, soups, broths, sauces, and other convenience foods where complex savory flavor profiles are desired. The compound would generally be incorporated into proprietary flavor blends rather than used as a standalone ingredient in consumer 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. "2-methyl-1-methylthio-2-butene — Safety, regulation, and evidence." https://additivefacts.com/additives/2-methyl-1-methylthio-2-butene. Accessed 2026-05-19.