Abstract
The racemic monoclinic polymorph of the title com-pound, C(8)H(10)O, is known from the literature [Antona et al. (1973 ▸). Acta Cryst. B29, 1372-1376] and has been redetermined here. Additionally, a new enanti-opure ortho-rhom-bic polymorph is reported. The strongest inter-molecular inter-actions are within one-dimensional hy-dro-gen-bonded chains which are very similar in the two polymorphs. On the other hand, the packing of the chains in the crystal differs significantly between the two forms.