Used in organic synthesis as an intermediate for pharmaceuticals and agrochemicals. Acts as a building block in the preparation of nitro-containing compounds due to its conjugated system and reactive aldehyde group. Employed in photochemical studies because of its light-sensitive properties, particularly in the development of photo-switchable molecules. Also utilized in the synthesis of heterocyclic compounds, including indoles and quinolines, through cyclization reactions. Its trans configuration enhances stability and reactivity in condensation and addition reactions.