science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: phosphoric acid Other Names: orthophosphoric acid; phosphoric(V) acid Formula: H3PO4 CAS-No.: 7664-38-2 PubChem: CID 1004 Study: uv absorption spectra Authors: M. Halmann, I. Platzner Title: The Photochemistry of Phosphorus Compounds. Part II. Far-ultraviolet Absorption Spectra of some Phosphorus Oxyanions in Aqueous Solution Journal/Source: J. Chem. Soc., 1440-1449, (1965); DOI: 10.1039/JR9650001440 Data: table, diagram Energy/Wavelength range: 183 - 205 nm Resolution: Temperature: 298 K Temperature dependence: no Pressure/Concentration: 2.4 M; 0.24 M Phase: aqueous solution pH: Comments: Solutions of phosphoric acid do not obey the Beer-Lambert Law; dilution with water causes increased absorptivity. Author to whom correspondence should be addressed: (e-mail address):