Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the production of nicotinamide-based drugs and vitamin B3 derivatives. It serves as a building block in the development of compounds with metabolic regulatory functions. Also employed in the preparation of agrochemicals and functional dyes due to its reactive aldehyde group and stable heterocyclic structure. Its methoxy and methyl substitutions enhance selectivity and yield in coupling reactions, making it valuable in fine chemical synthesis.