science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: formic acid Other names: Formular: CH2O2; HCOOH CAS-No.: 64-18-6 PubChem: CID 284 Study: uv absorption cross sections Authors: D.L. Singleton, G. Paraskevopoulos, R.S. Irwin Title: UV Absorption Cross-Sections of the Monomer and Dimer of formic Acid Journal/Source: J. Photochem., 37, 209-216, (1987); http://dx.doi.org/10.1016/0047-2670(87)85001-3 Data: table, diagram Energy/Wavelength range: 195 - 250 nm Resolution: 1 nm Temperature: 302 K Temperature dependence: no Pressure/Concentration: Phase: vapor pH: Comments: Absorption cross-sections of the monomer and dimer of formic acid vapor at 302 K have been determined at 1 nm intervals from 195 to 250 nm by non-linear least-squares analysis of the per cent transmission of 29 pressures of formic acid at each wavelength. The observed blue shift of the absorption maximum of the dimer with respect to the monomer and the lack of vibrational structure in the spectrum of the dimer are discussed.