2-methyl-4,5-dihydrofuran-3-thiol

2-methyl-4,5-dihydrofuran-3-thiol (CAS Number: 26486-13-5) is a synthetic organic compound belonging to the class of furan derivatives with a thiol (sulfur-containing) functional group. The molecule consists of a five-membered furan ring with a methyl substituent and a thiol group, plus partial saturation of the ring structure. This unique chemical architecture contributes to its distinctive flavor profile in food applications.

This flavoring agent is primarily used in processed food products where savory, meaty, roasted, or umami-like flavor notes are desired. It may appear in meat products, broths, soups, sauces, savory snacks, and other processed foods requiring enhanced savory characteristics. The compound is typically used in very small concentrations, as is standard for most synthetic flavoring agents in food manufacturing. Flavor compounds of this type are often part of complex flavor blends rather than used individually, contributing to the overall sensory profile of finished products.

The FDA has received zero adverse event reports associated with 2-methyl-4,5-dihydrofuran-3-thiol and no recalls have been issued involving this additive. These data points indicate no documented safety concerns in real-world use within the United States food supply. However, the compound is not on the FDA's GRAS (Generally Recognized As Safe) list, meaning it has not undergone the formal GRAS notification process or received explicit regulatory approval for use as a food additive. This status does not necessarily indicate a safety concern but rather reflects the regulatory pathway and approval status in the United States.

Like other synthetic flavoring compounds used at very low concentrations in food, toxicological assessment would typically focus on acute and chronic toxicity studies, genotoxicity, and allergenicity. Sulfur-containing flavor compounds are used extensively in the food industry, and many have established safety records. The volatile nature of many flavoring compounds means they are typically metabolized and eliminated relatively quickly from the body.

In the United States, 2-methyl-4,5-dihydrofuran-3-thiol is not on the FDA's GRAS list and does not appear to have an FDA Food Additive Petition or approval as a direct food additive. This limits its legal use in conventional food products in the U.S. market. However, it may be permitted under different regulatory frameworks in other countries. The European Union maintains its own approval process for flavoring substances, and many flavor compounds have different regulatory statuses across jurisdictions. Manufacturers considering use of this compound should verify its legal status in their target markets and applicable regulatory requirements.

The absence of a GRAS determination does not reflect on safety but rather on the completion of formal regulatory approval procedures. Some flavoring compounds may be used under grandfather status or other regulatory provisions depending on jurisdiction and prior use history.

Published scientific literature specifically examining the safety profile of 2-methyl-4,5-dihydrofuran-3-thiol appears limited in the public domain. Safety assessments of structurally related sulfur-containing flavor compounds are available in the literature and may provide relevant information for understanding this compound's likely safety profile. The Organization for Economic Co-operation and Development (OECD) and the International Organization for Standardization (ISO) publish guidance on testing methods for flavor and fragrance compounds.

Flavor and Extract Manufacturers Association (FEMA) provides expert panels that evaluate the safety of flavoring substances. Additional proprietary safety data may exist with flavor manufacturers but may not be publicly accessible. Any manufacturer considering or using this compound should maintain appropriate technical documentation regarding composition, purity, toxicology, and intended use levels.