1-Naphtholbenzein

Naphtholbenzein, phenylbis(4-hydroxynaphthyl)methanol; C₂₇H₁₈O₂ = 374.4 (145-50-6)

Brownish-red powder or shiny brownish-black crystals, practically insoluble in water, soluble in ethanol (96%) and in glacial acetic acid.