science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: potassium dihydrogen phosphate		Other Names: monopotassium phosphate; MKP

Formula: KH2PO4						CAS-No.: 7778-77-0	PubChem: CID 516951

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: 180 - 320 nm

Resolution: 

Temperature: 274 K; 281 K; 297 K; 318 K; 337 K; 349 K

Temperature dependence: yes

Pressure/Concentration: 

Phase: water and deuterium oxide solutions

pH:


Comments: The absorption spectra of solutions of potassium dihydrogen phosphate, potassium and sodium hydrogen phosphates, tetrasodium pyrophosphate, 
sodium tripolyphosphate, and sodium trimetaphosphate in solvents containing water or deuterium oxide, in the range 320-180  nm, are composed of both 
weak bands  (above 200 nm).
Changes in temperature have no effect on the shallow plateau at 240-270  nm, but strongly affect the sharp absorption edge below 220 nm.

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