Divinyl sulfide is the organosulfur compound with the formula S(CH=CH2)2.

A colorless liquid with a faint odor, it is found in some species of Allium.

[2] Divinylsulfide can arise when inadvertently when acetylene is generated by hydrolysis of technical-grade calcium carbide contaminated with calcium sulfide.

[3] Divinylsulfide was first prepared in 1920 by the reaction of bis(2-chloroethyl)sulfide with sodium ethoxide:[3] With the formula CH2=CHSR, a variety of monovinyl sulfides are known.

[5][6] Alkyl ketones react with thiols in the presence of phosphorus pentoxide to give vinyl sulfides:[7]