Trade name(s) Defendor and ingredient in Orion, GoldSky, FirstStep, and Spitfire

Manufacturer(s) Corteva, Syngenta

Formulation(s) 0.42 lb/gal emulsifiable concentrate and packaged with other herbicides

Remarks Broadleaf herbicide used in cereals for broadleaf weed control.

Water solubility 84 ppm at pH 5, 6360 ppm at pH 7, and 94,200 ppm at pH 9

Storage conditions Not available

Acute toxicity LD50 - greater than 6,000 mg/kg

Action in plant Inhibits acetolactate synthase (ALS) enzyme

Site of action Group 2: acetolactate synthase inhibitor

Chemical family Sulfonanalide

Koc Average is 2 to 69 mL/g; average 18 mL/g