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7-hydroxy-1,5-naphthyridine-3-carboxylic acid; CAS No.: 2703757-06-4; 7-hydroxy-1,5-naphthyridine-3-carboxylic acid. PROPERTIES: 7-hydroxy-1,5-naphthyridine-3-carboxylic acid is a crystalline substance with molecular formula C8H4N2O3. It has a melting point of approximately 230-235 C and exhibits limited solubility in common organic solvents. The compound is light-sensitive and should be stored in amber glassware at 2-8 C. Safety precautions include wearing protective clothing due to its potential to cause skin burns and using explosion-proof ventilation due to its explosive nature when exposed to heat. APPLICATIONS: This hydroxylated naphthyridine carboxylic acid is used in the development of anticancer prodrugs. The hydroxyl group serves as a reducible moiety that gets activated in the tumor microenvironment as reported in cancer research literature. In chemical biology, 7-hydroxy-1,5-naphthyridine-3-carboxylic acid serves as a building block for creating photoaffinity labels. According to biochemical journals, the naphthyridine scaffold provides a fluorescent signal while the carboxylic acid group enables photoinduced cross-linking with target proteins.