science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2022 Substance: 2,4-dichlorophenoxyacetic acid Other Names: 2,4-D Formula: C8H6Cl2O3 CAS-No.: 94-75-7 PubChem: CID 1486 Study: photolysis, quantum yields Authors: W. Chu Title: Modeling the quantum yields of herbicide 2,4-D decay in UV/H2O2 process Journal/Source: Chemosphere, 44 (5), 935-941, (2001); https://doi.org/10.1016/S0045-6535(00)00556-7 Data: Energy/Wavelength range: 253.7 nm Resolution: Temperature: 298 K Temperature dependence: no Pressure/Concentration: Phase: aqueous buffer solution pH: Comments: The 2,4-D decay quantum yields under ultraviolet (UV) light at 253.7 nm increased from 4.86 x 10(-6) to 1.30 x 10(-4) as the ratio of (H2O2)/(2,4-D) increased from 0.05 to 12.5. The decay of 2,4-D was also pH dependent.