science-softCon uv/vis+ spectra data base; www.uv-spectra.de; (C) science-softCon 2010 Substance: 1,2,3,4,6,7,8-heptachlorodibenzo-p-dioxin Other Names: 1,2,3,4,6,7,8-HCDD Formula: C12HCl7O2 CAS-No.: 35822-46-9 Study: UV photodissociation, quantum yields Authors: Ghulam Ghaus Choudhry, G.R.B. Webster Title: Environmental photochemistry of PCDDs. 2. Quantum yields of the direct phototransformation of 1,2,3,7-tetra-, 1,3,6,8-tetra-, 1,2,3,4,6,7,8-hepta-, and 1,2,3,4,6,7,8,9-octachlorodibenzo-p-dioxin in aqueous acetonitrile and their sunlight half-lives Journal/Source: J. Agric. Food Chem., 37 (1), 254-261, (1989); DOI: 10.1021/jf00085a059 Data: (diagram, table, disk): table Energy/Wavelength range: 313 nm Resolution: Temperature: Temperature dependence: Pressure/Concentration: Comments: The quantum yields at 313 nm for the direct phototransformation of the candidate PCDD isomers in these solvent systems were (5.42 ± 0.42) x 10-4, (2.17 ± 0.14) x 10-3, (1.53 ± 0.17) x 10-5, and (2.26 ± 0.33) x 10-5, respectively. Author to whom correspondence should be addressed: (e-mail address):