... service 3.Professional supplier NOMENCLATURE 2,4-DCommon name2,4-D (BSI, E-ISO, (m) F-ISO, WSSA); 2,4- ... codesL208 (Marks) PHYSICAL CHEMISTRY 2,4-DCompositionTech. is ³96% pure. Mol. wt.221.0 M.f.C8H6Cl2O3FormColourless powder, with a slight ... formulations to prevent this. Photolytic DT50 (simulated sunlight) 7.5 d. pKa2.73 APPLICATIONS BiochemistrySynthetic auxin (acting like indolylacetic acid). Mode ...