Ametryn, a member of the triazine chemical family, is a herbicide which inhibits photosynthesis and other enzymatic processes. It is used to control broadleaf weeds and annual grasses in pineapple, sugarcane and bananas. It is used on corn and potato crops for general weed control. It is also used as a vine desiccant on dry beans and potatoes. Ametryn is available as an emulsifiable concentrate, flowable wettable powder and a wettable powder.

Ametryn breaks down in soil and groundwater, the amount of time it takes to degrade to half of the original concentration, is 70 to 250 days, depending on the soil type and weather conditions. Loss from the soil is principally by microbial degradation. Ametryn moves both vertically and laterally in soil due to its high water solubility. Because it is persistent, it may leach as a result of high rainfall, floods, and furrow irrigation. Breakdown in Vegetation: Ametryn is broken down into non-toxic substances by tolerant plants and, to a lesser extent, by sensitive plants.

Appearance: White Powder
Chemical Name: 2-(ethylamino)-4-isopropylamino-6-methyl-thio-s-triazine
CAS Number: 834-12-8
Molecular Weight: 227.3
Water Solubility: 185 mg/l at 20 degrees C. It dissolves readily in organic solvents including hexane, toluene, methanol, and acetone (50, 54).
Solubility in Other Solvents: Soluble in acetone (610), methanol (510), toluene (470), n-octanol (220), hexane (58)
Melting Point: 84-85 degrees C (50)
Vapor Pressure: 0.365 mPa
Partition Coefficient: 676 (50).
Specifications: 95% TC, 80% WDG, 50% SC