3 hydroxypyridine

2-Amino-3-hydroxypyridine as a chromogenic reagent for the spectrophotometric determination of osmium.

3-Hydroxypyridine, extracted from Bamboo grass, is a structural analogue of vitamin B6. It exhibits diverse pharmacological properties, including antioxidant activity.

3-Hydroxypicolinic acid (Picolinic acid, 3-hydroxy- (6CI,7CI,8CI)), a picolinic acid derivative, belongs to the pyridine family.

6-Hydroxynicotinic acid (6-Hydroxypyridine-3-carboxylic acid) is exploited in the use of NMR spectroscopy or gas chromatography--mass spectrometry for the diagnosis of Pseudomonas aeruginosa in urinary tract infection. Among the common bacteria causing urinary infection, only P. aeruginosa produces 6-hydroxynicotinic acid from nicotinic acid.