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Description
TCI E0787 Ethyl trans-2-Hexenoate with CAS number 27829-72-7 is a short-chain unsaturated ester carrying a double bond at the two position with trans geometry. The compound belongs to the class of simple lipids and is widely found in nature as an aroma component of various fruits. In the laboratory it plays a dual role: it serves as a reference material for the analysis of aroma compounds and at the same time as an organic synthesis reagent that supplies a ready-to-use conjugated ester system for further chemical transformations requiring an electron acceptor.
The principal characteristic that makes this compound a preferred choice is its conjugated carbonyl system coupled to a carbon-carbon double bond. That arrangement makes it a good Michael acceptor, able to receive nucleophilic attack at the beta position, and equally a dienophile in Diels-Alder cycloaddition reactions. The double bond can also be hydrogenated, epoxidized, or selectively hydroxylated. From the analytical side, the well-defined trans geometry and the low molecular weight make the compound easy to separate by gas chromatography and give clear spectral patterns, so it is well suited as an identity marker in volatile compound profiles.
In Indonesia this material is used in laboratories that work on flavour and aroma characterisation, in food and agricultural product research groups, and in synthetic organic chemistry teaching and research laboratories. It is typically handled as a reference standard for volatile compound profiling on gas chromatography systems, or as a starting material in reaction development work where a conjugated ester acceptor is needed. Universities, government research institutes, and quality control laboratories are the usual users of this grade of material.
Laboratory Applications
Aroma compound reference standard: the defined trans configuration and low molecular weight give a clean, reproducible peak on gas chromatography, making it dependable for identifying and confirming this ester within complex volatile profiles.
Michael addition reagent: the conjugated carbonyl activates the beta carbon toward nucleophilic attack, so the ester functions as a well-behaved acceptor for carbon, nitrogen, sulfur, and oxygen nucleophile additions.
Diels-Alder cycloaddition substrate: acting as a dienophile, the electron-poor double bond reacts with dienes to build six-membered carbocyclic frameworks bearing a synthetically useful ester handle for later elaboration.
Selective double bond transformation studies: the isolated, activated alkene can be hydrogenated, epoxidized, or hydroxylated, which makes this ester a convenient model substrate for developing and comparing chemoselective reaction conditions.
Food and agricultural product flavour research: because the compound occurs naturally as a fruit aroma constituent, it is used to spike, calibrate, and validate methods that quantify fruit-derived volatile esters.
Specifications
Brand: TCI (Tokyo Chemical Industry)
CAS number: 27829-72-7
Catalogue number: E0787
Category: Life Science > Biochemicals and Reagents > Lipids
Pack sizes: available in standard TCI laboratory pack sizes; please confirm the currently offered packaging when ordering
Storage: store in a tightly closed container in a cool, well-ventilated place away from heat and ignition sources
Handling and Storage
Keep the container tightly closed at all times and store it in a cool, dry, well-ventilated area away from heat, sparks, open flames, and direct sunlight, since short-chain unsaturated esters are volatile and their double bond is sensitive to prolonged exposure to air and light. Amber glass bottles with chemically resistant closures are the appropriate containers, and transferring the liquid under an inert atmosphere helps preserve quality over repeated use. Handle in a fume hood, wear safety glasses, nitrile gloves, and a laboratory coat, and avoid inhaling the vapour. Allow refrigerated material to equilibrate to room temperature before opening to prevent moisture condensation, and always consult the manufacturer's safety data sheet before use.
