What is "chloranil"

Chloranil \Chlor`an"il\, n. [Chlorine + aniline.] (Chem.) A yellow crystalline substance, C6Cl4.O2, regarded as a derivative of quinone, obtained by the action of chlorine on certain benzene derivatives, as aniline.

n. A quinone with the molecular formula C₆Cl₄O₂, used as a fungicide.

Chloranil is a quinone with the molecular formula CClO. Also known as tetrachloro-1,4-benzoquinone, it is a yellow solid. Like the parent benzoquinone, chloranil is a planar molecule that functions as a mild oxidant.