2-hydroxy-benzonitril is a white to light yellow crystalline solid, slightly soluble in water. Its molecular structure contains functional groups such as benzene rings, cyano groups and hydroxyl groups, which can undergo hydrogen bonding and nucleophilic substitution reactions. Salicylonitrile is an important intermediate for the synthesis of amino acids, heterocyclic compounds and hydroxyl-containing compounds. It can also be used as a precursor for the synthesis of dyes or as a catalyst in organic synthesis reactions, and has significant value in the field of fine chemicals.