How Does Naphthol Form?

The compound 1-naphthol, or α-naphthol, made by heating 1-naphthalenesulfonic acid with caustic alkali or by heating 1-naphthylamine with water under pressure, is used directly in making several dyes, and large amounts of it are converted to compounds ultimately incorporated into other dyes.

How will you convert naphthalene into 1-naphthol?

1-Naphthol is prepared by two main routes. In one method, naphthalene is nitrated to give 1-nitronaphthalene, which is hydrogenated to the amine followed by hydrolysis: C₁₀H₈ + HNO₃ → C₁₀H₇NO₂ + H₂O. C₁₀H₇NO₂ + 3 H₂ → C₁₀H₇NH₂ + 2 H₂O.

How is beta naphthol prepared?

Beta naphthol sodium salt may be prepared by adding the sodium naphthalene sodium salt to a reaction solvent containing water and an organic solvent and hydrolyzing (S130). The hydrolysis may be carried out by dropwise addition of a second basic solution to the naphthalene sodium salt.