What is 2-methyltetrahydrothiophen-3-one?
2-methyltetrahydrothiophen-3-one (CAS Number: 13679-85-1) is a synthetic organic compound classified as a flavoring agent. It belongs to the thiophene family of chemicals, which are heterocyclic aromatic compounds containing sulfur. The molecule consists of a five-membered ring structure with sulfur and a methyl substituent. In its pure form, this compound is a colorless to pale yellow liquid with a distinctive savory and meaty odor profile.
Common Uses
This flavoring compound is used in the food industry as a flavor enhancer and flavoring agent. It is typically employed in savory food applications where meaty, brothy, or umami-like taste notes are desired. Common applications include:
- Processed meat products
- Seasoning blends and spice mixes
- Savory snacks and crackers
- Canned soups and broths
- Instant noodles and food flavorings
- Pet food formulations
The compound functions in very small quantities, typically measured in parts per million (ppm), making it an economical ingredient for manufacturers seeking to enhance savory characteristics without significantly altering product composition.
Safety Assessment
As of the available data, 2-methyltetrahydrothiophen-3-one has generated zero reported adverse events to the FDA and has not been associated with any product recalls. These metrics indicate no documented safety incidents in U.S. food supply monitoring systems.
The compound does not hold FDA GRAS (Generally Recognized As Safe) status, which means it has not undergone the formal GRAS notification process or determination. However, the absence of GRAS status does not indicate a safety concern; rather, it reflects the additive's regulatory category and market classification. Many legitimate food additives function in commerce without GRAS designation.
Unlike some synthetic flavoring compounds, thiophene derivatives are not among commonly restricted or banned substances in major regulatory jurisdictions. The chemical stability of 2-methyltetrahydrothiophen-3-one under standard food storage conditions is generally favorable, with minimal potential for degradation into harmful byproducts.
Information regarding detailed toxicological studies specific to this compound is limited in publicly available scientific literature. The compound's use in food remains at extremely low concentrations, which inherently limits potential exposure.
Regulatory Status
In the United States, this compound is not classified as a direct food additive under FDA regulations with explicit GRAS determination. However, it may be used under the flavor industry's self-affirmed GRAS notification system, where manufacturers can determine GRAS status through competent scientific evaluation without formal FDA approval. This regulatory pathway, established under FDA guidelines, allows certain flavoring substances to be used based on scientific consensus regarding safety.
The European Union and other major markets have varying approval status for this compound. Unlike the U.S. system, EU regulations require explicit approval of flavor substances, and 2-methyltetrahydrothiophen-3-one's inclusion on approved flavor lists varies by jurisdiction.
Because it functions in minimal quantities (typical use levels below 10 ppm), exposure risk from dietary sources is considered minimal even in populations with regular consumption of flavored products.
Key Studies
Published scientific literature specifically documenting toxicological studies of 2-methyltetrahydrothiophen-3-one is sparse in accessible databases. Most information derives from industry-compiled safety data and general knowledge of thiophene compound behavior.
Research on structurally similar thiophene-containing flavor compounds suggests these molecules are metabolized efficiently by standard hepatic pathways. General principles of flavor safety assessment apply: the extreme dilution in food products and established safe use in the flavor industry provide reasonable confidence in safety at intended use levels.
The absence of adverse event reports across decades of use in international food manufacturing, combined with zero FDA recalls, provides empirical evidence supporting continued safe use within current application parameters.