... price and best service 3.Professional supplier 2,4D Acid 98%TCA.I. Content,%(m/m)≥ 96.0Drying loss ... D Amine salt content, g/L≥ 7202,4-D Acid content, g/L≥600Free phenol, %≤ 0.5Specific gravity1 ... pKa2.73 2.APPLICATIONS BiochemistrySynthetic auxin (acting like indolylacetic acid). Mode of actionSelective systemic herbicide. Salts are readily ... depends upon the particular formulation. 2 4-D Acid 98%TC