邻苯二酚（化学式：C₆H₄(OH)₂），也称儿茶酚（英文：Catechol）、焦性儿茶酚、焦儿茶酚（英文：Pyrocatechol），是苯的两个邻位氢被羟基取代后形成的化合物。

无色或白色晶体，可燃，可以升华，其固体或溶液露置于空气中时，会逐渐氧化变为棕褐色。可溶于水、乙醚、苯、氯仿，易溶于氢氧化物和吡啶中。有一定的毒性，中毒症状与苯酚的中毒症状类似，为呼吸道刺激、血压升高、体温不稳定等。

Catechol (/ˈkætᵻtʃɒl/), also known as pyrocatechol or 1,2-dihydroxybenzene, is an organic compound with the molecular formula C₆H₄(OH)₂. It is the ortho isomer of the three isomeric benzenediols. This colorless compound occurs naturally in trace amounts. It was first discovered by destructive distillation of the plant extract catechin. About 20 million kg are now synthetically produced annually as a commodity organic chemical, mainly as a precursor to pesticides, flavors, and fragrances.