title: 2,2'-(p-Phenyl-enedithio)diacetic acid.
abstract: The complete molecule of the title compound, C(10)H(10)O(4)S(2), is generated by a crystallographic inversion centre. In the crystal, mol-ecules are linked into a one-dimensional chain by inter-molecular O-H⋯O hydrogen bonds.
authors.affiliation: Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004, People's Republic of China.
authors.forename: Jian-Ling
authors.initials: JL
authors.lastname: Yin
authors.forename: Yun-Long
authors.initials: YL
authors.lastname: Feng