naphthol

/ˈnæfθɔl/
noun
  1. A chemical compound derived from naphthalene, used in making dyes, antiseptics, and other products.
    • The lab technician handled naphthol carefully because it can irritate the skin.
    • Some old antiseptic solutions contained naphthol as an active ingredient.
    • Naphthol is an important ingredient in the production of certain synthetic dyes.