What is Cis- and Trans-2-pentyl-4-propyl-1,3-oxathiane?
Cis- and trans-2-pentyl-4-propyl-1,3-oxathiane (CAS Number 59323-81-8) is a synthetic flavoring compound belonging to the oxathiane chemical class. The molecule contains a six-membered ring with both oxygen and sulfur atoms (an oxathiane ring) with pentyl (5-carbon chain) and propyl (3-carbon chain) substituents. The cis- and trans- designations refer to the geometric isomers of this compound, which have slightly different spatial arrangements of their chemical groups. This structural diversity allows the compound to deliver complex savory flavor characteristics in food applications.
Common Uses
This additive is primarily used in the flavor industry as a component in artificial flavoring systems designed to enhance savory, meaty, and umami taste profiles. It may appear in processed meat products, soups, broths, sauces, seasonings, and savory snack foods where manufacturers seek to intensify natural meat flavors or create meat-like sensory experiences in plant-based or lower-meat-content products. The compound's sulfur-containing structure is typical of savory flavor compounds, as sulfur-based molecules are known to contribute to meaty and roasted notes in food flavoring.
As with most complex synthetic flavoring agents, the actual concentration used in final food products is typically very low, measured in parts per million (ppm).
Safety Assessment
Cis- and trans-2-pentyl-4-propyl-1,3-oxathiane has not been granted Generally Recognized As Safe (GRAS) status by the FDA, though this does not inherently indicate a safety concern. The compound can still be used in foods if it complies with FDA regulations for food additives and has undergone appropriate safety evaluations.
According to FDA records, there have been zero adverse event reports associated with this flavoring agent and zero product recalls linked to its use. This absence of reported incidents suggests that if the compound is present in the food supply, it has not been associated with consumer safety problems at currently used levels.
The limited public availability of toxicological data for this specific compound is not unusual for synthetic flavoring ingredients, which are often used at extremely low concentrations where comprehensive safety studies may not be deemed necessary by regulatory agencies.
Regulatory Status
In the United States, this additive is regulated as a food additive under FDA jurisdiction. While it lacks GRAS status, it may be used in foods under the Food Additive Regulations if proper authorization exists or if it falls under flavor ingredients that meet specific regulatory pathways.
The European Food Safety Authority (EFSA) has not published specific safety evaluations for this individual compound in readily available public databases, though it may be evaluated under the EU's flavoring regulations framework.
Manufacturers using this additive must comply with all applicable labeling requirements and use limitations established by their respective regulatory authorities.
Key Studies
Published toxicological data specifically addressing cis- and trans-2-pentyl-4-propyl-1,3-oxathiane is limited in the scientific literature available to the general public. Most safety evaluations for such compounds are conducted by flavor manufacturers, regulatory agencies, and contract research organizations, with results submitted to regulatory bodies as part of the approval process.
The absence of published peer-reviewed studies on this specific compound is typical for proprietary flavoring agents used at very low concentrations. Safety assessments for flavor compounds of this type generally rely on structure-activity relationship (SAR) analysis, in vitro and animal testing data, and comparison to chemically similar compounds with established safety profiles.
The zero reported adverse events and zero recalls associated with this additive suggest it has been used without incident where authorized.