4-Hydroxybenzoic acid 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.

Emedastine is a second generation, selective histamine H1 receptor antagonist with anti-allergic activity.

Naxillin is a non-growth hormone-like molecule that induces lateral root development by positively affecting the IBA to IAA transition at specific sites in the root.