Trade name(s) Butoxone, Butoxone Ester, Butyrac, 2,4-DB 200
Manufacturer(s) Albaugh, Winfield, Nufarm, and others
Formulation(s) 1.75 and 2 lb/gal emulsifiable and soluble concentrates, formulated as amine salts and esters, and 75% water-soluble powders.
Remarks A phenoxy compound used as a selective, postemergence, translocated herbicide, particularly for broadleaf weed control in legumes. Material is beta-oxidized to 2,4-D very slowly by most legumes and rapidly by broadleaf weeds. Selectivity decreases with maturity of the legumes.
Water solubility 40 ppm
Storage conditions Read each product label.
Acute toxicity LD50 - 1,960 mg/kg
Action in plant Mimics natural plant hormones.
Site of action Group 4: synthetic auxin
Chemical family Phenoxy acetic acid
Koc Average is 440 mL/g (estimated) for the acid, 500 mL/g for the butoxyethyl ester, and 20 mL/g (estimated) for the dimethylamine salt