Used primarily in organic synthesis and photochemical studies due to its ability to undergo reversible cis-trans isomerization upon exposure to light. This property makes it valuable in the development of molecular switches and photoresponsive materials. It also serves as a model compound in mechanistic studies of electrocyclic reactions and pericyclic processes. Additionally, cis-stilbene is employed in the preparation of fluorescent dyes and optical brighteners, where its conjugated structure contributes to light absorption and emission characteristics. Its reactivity in cycloaddition reactions further enables its use in constructing complex polycyclic frameworks for pharmaceutical and material science applications.