Alphanaphthol

Alphanaphthol, also known as 1-naphthol, is an organic compound with the chemical formula C10H7OH. It is a positional isomer of naphthol, specifically differing from betanaphthol (2-naphthol) by the position of the hydroxyl group on the naphthalene ring. Alphanaphthol typically appears as a white to yellowish crystalline solid. It is sparingly soluble in water but readily dissolves in organic solvents such as ethanol, ether, and benzene.

The compound is produced industrially through the sulfonation of naphthalene followed by fusion with sodium hydroxide, or by the hydrolysis of 1-aminonaphthalene. Alphanaphthol serves as an important intermediate in the synthesis of various chemicals. Its primary applications include its use in the production of dyes, pigments, and agrochemicals, particularly insecticides and pesticides. It is also employed in the manufacture of pharmaceuticals and fragrances. In analytical chemistry, it can be used as a reagent. Alphanaphthol is combustible and should be handled with appropriate safety precautions, avoiding exposure to skin and eyes, and ensuring adequate ventilation.