... 2,4D Acid 98%TCA.I. Content,%(m/m)≥ 96.0Drying loss of weight,%(m/m)≤ 1.5Free Phenol, %(m/m)≤ 0. ... l (30 ºC). Stability2,4-D is a strong acid, and forms water-soluble salts with alkali ... precipitation of the calcium and magnesium salts, but a sequestering agent is included in formulations to prevent ... regions of shoots and roots. Acts as a growth inhibitor. UsesPost-emergence control of annual ...