science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2020

Substance: formic acid					Other Names: methanoic acid

Formula: HCOOH						CAS-No.: 64-18-6	PubChem: CID 284

Study: vuv molar extinction coefficients

                
Authors: J.L. Weeks, G.M.A.C. Meaburn, S. Gordon

Title: Absorption coefficients of liquid water and aqueous solutions in the far ultraviolet

Journal/Source: Radiation Research, 19, 559-567, (1963); https://www.jstor.org/stable/3571475 


Data: 

Energy/Wavelength range: 180 - 190 nm

Resolution: 

Temperature: 298 K

Temperature dependence: no

Pressure/Concentration: 26.5 M HCOOH

Phase: aqueous solution

pH:


Comments: The extinction coefficients have been determined at 184.9 nm and/or 180 -190 nm for aqueous
solutions of sulfuric acid, sodium sulfate, ethyl acetate, methyl alcohol, formic acid, sidium formate,
perchloric acid, hydrogen peroxide, potassium carbonate, and potassium iodide, bromide, and chloride.
The data for formic acid, when corrected for the absorption of formate ion at the various concentrations studied,
yield a constant value of 34.9 (liters mole-1 cm-1) at 1849 A for the extinction coefficient of undissociated formic acid.

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