Trade name(s) Butyrac, 2,4-DB 200

Manufacturer(s) Albaugh, Drexel, Winfield,

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