4-Hydroxybenzoic acid, also known as p-hydroxybenzoic acid (PHBA), is a monohydroxybenzoic acid, a phenolic derivative of benzoic acid. It is a white crystalline solid that is slightly soluble in water and chloroform but more soluble in polar organic solvents such as alcohols and acetone.
H 1585 (OTTO) p-Hydroxybenzoic acid, 99% Cas 99-96-7 - used as an intermediate for dyes, antiseptics and active pharmaceutical ingredients.