science-softCon uv/vis+ spectra data base, www.uv-spectra.de, (C) science-softCon 2019 Substance: nicotinic acid Other Names: niacin Formula: C6H5NO2 CAS-No.: 59-67-6 Study: Near Ultraviolet Absorption Spectra Authors: H.P. Stephenson, H. Sponer Title: Near Ultraviolet absorption spectra of the pyridine monocarboxylic acids in water and ethanol solutions Journal/Source: J. Am. Chem. Soc., 79 (9), 2050-2056, (1957); DOI: 10.1021/ja01566a008 Data: diagram, table Energy/Wavelength range: ~ 222 - 303 nm (33000 - 45000 cm-1) Resolution: Temperature: 298 K Temperature dependence: no Pressure/Concentration: 4 x 10^-3 to 4 x 10^-4 mole/l. Phase: solution (ethanol; water) pH: Comments: The near ultraviolet absorption spectra of picolinic, nicotinic and isonicotinic acids (2-, 3- and 4-pyridinecarboxylic acids) have been measured in 95% ethanol and distilled mater solutions, and for isonicotinic acid, also for several mixtures of these two solvents. The maxima of the Pi-Pi* transitions in the spectrum are listed in table 1. 38000 cm-1; epsilon(max) = 2840 (in ethanol) 38200 cm-1; epsilon(max) = 4230 (in water) Author to whom correspondence should be addressed: (e-mail address):