science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: picolinic acid Other Names: 2-pyridinecarboxylic acid Formula: C6H5NO2 CAS-No.: 98-98-6 Study: UV absorption spectra Authors: H.H.G. Jellinek , J.R. Urwin Title: Ultraviolet Absorption Spectra and Dissociation Constants of Picolinic, Isonicotinic Acids and their Amides Journal/Source: J. Phys. Chem., 58 (7), 548-550, (1954); DOI: 10.1021/j150517a009 Data: diagram Energy/Wavelength range: 225 - 275 nm Resolution: Temperature: 293 K Temperature dependence: no Pressure/Concentration: Phase: solution pH: 0.5 - 6 Comments: The spectra of picolinic acid show maxima at about 265 nm and a shoulder, which shift with the pH values in the region of about 270 nm. At very low pH values the maximum absorption shifts to longer wavelengths. Author to whom correspondence should be addressed: (e-mail address):