... 2,4-DCommon name2,4-D (BSI, E-ISO, (m) F-ISO, WSSA); 2,4-PA (JMAF)IUPAC name(2,4-dichlorophenoxy)acetic acid Chemical Abstracts name(2,4 ... -361-1 Development codesL208 (Marks) PHYSICAL CHEMISTRY 2,4-DCompositionTech. is ³96% pure. Mol. wt ... 2.58-2.83 (pH 1), 0.04-0.33 (pH 5) Henry1.32 ´ 10-5 Pa m3 mol-1 (calc.) S ... of the calcium and magnesium salts, but a sequestering agent is included in formulations to ...