science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: 1,2,3,4,7-Pentachlorodibenzo-p-dioxin Other Names: 1,2,3,4,7-PCDD; Dibenzo-p-dioxin, 1,2,3,4,7-pentachloro- Formula: C12H3Cl5O2 CAS-No.: 39227-61-7 PubChem: Study: photolysis, quantum yields, uv absorption spectra Authors: G.G. Choudhry, G.R.B. Webster Title: Environmental photochemistry of PCDDs. Part I. Kinetics and quantum yields of the photodegration of 1,2,3,4,7-penta- and 1,2,3,4,7,8-hexachlorodibenzo-p-dioxin in aqueous acetontrile Journal/Source: Chemosphere, 14 (1), 9-26, (1985); http://dx.doi.org/10.1016/0045-6535(85)90038-4 Data: table, diagram Energy/Wavelength range: 254 - 330 nm Resolution: Temperature: 298 K Temperature dependence: no Pressure/Concentration: 4.8881 x 10^-6 M Phase: solution (water-acetonitrile, 4:6 v/v) pH: Comments: Quantum yields at 313 nm for 1,2,3,4,7-penta- and 1,2,3,4,7,8-hexachlorodibenzo-p-dioxin in aqueous acetonitrile (4:6 v/v) were (9.781 ± 2.376) 10-5 and (1.096 ± 0.020) × 10-4, respectively. In addition the absorption spectra are presented. Author to whom correspondence should be addressed: (e-mail address):