Description General description 4-Phenylphenol (4-hydroxybiphenyl, 4-HBP), a biaryl compound, is a weakly acidic 4-arylphenol. A study on its crystalline structure has been reported. Its rapid, green synthesis via a Pd(0)-catalyzed Suzuki cross-coupling reaction in water has been reported. The standard molar enthalpy of formation of 4-phenylphenol has been evaluated using combustion calorimetry. The solid-matrix luminescence properties for 4-phenylphenol adsorbed on filter paper has been investigated. A study conducted using the yeast two-hybrid assay suggests that it shows estrogenic activity. Application 4-Phenylphenol may be used in the following studies: • As a reactant in the synthesis of new azobenzene sulfonic acid dopants by diazotized coupling reaction with sulphanilic acid diazonium salt. • As a starting material in the synthesis of 2,6-poly(4-phenylphenol). • As a ligand in the synthesis of aluminum (III) bis(2-methyl-8-quninolinato)-4-phenylphenolate (BAlq). Packaging 1 g in poly bottle