Scytalone dehydratase; part of the gene cluster that mediates the biosynthesis of dihydroxynaphthalene (DHN)-melanin, a bluish-green pigment and a structural component of the conidial wall (PubMed:8953707). Within the pathway, catalyzes the dehydration of scytalone as well as of vermelone (PubMed:8953707). scytalone = 1,3,8-trihydroxynaphthalene + H2O Carpropamid acts as an efficient inhibitor of scytalone dehydratase activity. Pigment biosynthesis; melanin biosynthesis. Homotrimer (By similarity). Each subunit contains an active site, located in the central part of the hydrophobic core of the monomer, which functions independently (By similarity). Forms reddish-brown colonies and accumulated reddish pigments in the culture medium (PubMed:8953707). Belongs to the scytalone dehydratase family.