In the title compound, C(12)H(12)O(2)S, the asymmetric unit contains two independent mol-ecules. The chiral C atoms of both mol-ecules were established to be in the R configuration. In both mol-ecules, the 2,5-dihydro-thio-phene rings adopt S-envelope conformations wherein the S atoms are displaced by 0.315 (5) and -0.249 (5) Å from the mean planes of the remaining ring atoms. In the crystal, the molecules are linked by weak C-H⋯O interactions.