2-Methylthiophene is an organosulfur compound with the formula CH3C4H3S.

It is a colorless, flammable liquid.

It can be produced by Wolff-Kishner reduction of thiophene-2-carboxaldehyde.

[1] Its commercial synthesis involvess vapor-phase dehydrogenation of a 1-pentanol/CS2 mixture.

[2]