Trans-2-Hexenal

Trans-2-Hexenal (CAS No.: 6728-26-3) is a naturally occurring volatile α,β-unsaturated carbonyl compound predominantly found in green plant tissues, where it contributes to characteristic leaf-derived aromas and functions as a defensive signaling molecule against environmental stressors. This compound is classified within reactive aldehydes and is widely studied in plant biology, chemical ecology, and redox-related biochemical research due to its electrophilic reactivity toward biological nucleophiles such as thiols and amines. Through covalent modification of nucleophilic residues in proteins and small biomolecules, trans-2-hexenal is implicated in modulating cellular redox homeostasis and stress-response signaling pathways, including those associated with oxidative stress and detoxification processes. It exhibits antifungal activity and inhibitory effects on seed germination and early plant development, supporting its role in plant defense and growth regulation. In biochemical and analytical research, trans-2-hexenal is frequently utilized as a probe compound for assessing the presence and reactivity of low-molecular-weight carbonyl species in biological samples. In vitro studies typically employ concentrations in the low micromolar to millimolar range depending on assay conditions, reflecting its moderate reactivity and volatility. This compound is commonly applied in cell-based and biochemical assays investigating electrophile-induced signaling, protein adduct formation, and oxidative stress responses, as well as in broader screening platforms aimed at characterizing reactive carbonyl species and their biological impacts.