2,3-Dichloro-1,4-naphthoquinone, commonly known as Dichlone, is an organic compound with the chemical formula C10H4Cl2O2. It is a yellow crystalline solid with a distinctive odor. Dichlone is a naphthoquinone derivative and is widely used in various applications, particularly as a fungicide and herbicide due to its broad-spectrum antimicrobial and weed-killing properties.