The Collaborative International Dictionary of English v.0.48:

Thiophenol \Thi`o*phe"nol\, n. [Thio- + phenol.] (Chem.)
   A colorless mobile liquid, C6H5.SH, of an offensive odor,
   and analogous to phenol; -- called also phenyl sulphydrate.
   [1913 Webster]