The molecule is a cyclic dicarboxylic anhydride that is phthalic anhydride chlorinated at the 4-, 5-, 6- and 7-positions. It has a role as a cross-linking reagent and an allergen. It is a cyclic dicarboxylic anhydride and a tetrachlorobenzene. It derives from a phthalic anhydride.
4,5,6,7-tetrachloro-2-benzofuran-1,3-dione