... 2,4-D (BSI, E-ISO, (m) F-ISO, WSSA); 2,4-PA (JMAF) IUPAC name (2,4-dichlorophenoxy)acetic acid Chemical Abstracts name (2,4 ... SL.Molecular formula: C8H6Cl2O3Molecular weight: 221.0Properties:Colourless powder, with a slight phenolic odour. Toxicity: Oral Acute oral LD50 ... are readily absorbed by the foliage. Translocation occurs, with accumulation principally at the meristematic regions of shoots and ...