Trade name(s) AAtrex, Atrazine
Manufacturer(s) Syngenta, Corteva, and others
Formulation(s) 80% wettable powder, 4 lb/gal liquid, 90% water-dispersible granule
Remarks A selective, root-absorbed herbicide. Some foliar absorption but with little translocation. Most plant tissue contacted by spray is injured. More soluble and less strongly adsorbed on soil than simazine; thus, less moisture is needed to activate it. More active on soils with high pH.
Water solubility 33 ppm
Storage conditions Very stable
Acute toxicity LD50 - 5,100 mg/kg
Action in plant Inhibits photosynthesis.
Site of action Group 5: photosystem II inhibitor
Chemical family Triazine
Koc Average is 100 mL/g