4-Vinylcyclohexene dioxide (VCD) is an organic compound that contains two epoxide functional groups.

It is industrially used as a crosslinking agent for the production of epoxy resins.

[5] 4-Vinylcyclohexene dioxide, like other volatile epoxides, is classified as an alkylating agent.

It is a killer of oocytes, eggs in a female's ovaries, in immature ovarian follicles in mice and rats.

[7][8][9] In pest control, it has been used as an ovotoxic agent for reducing rat fertility.