Tribenuron

Common name  tribenuron-methyl

IUPAC name  methyl 2-[4-methoxy-6-methyl-1,3,5-triazin-2-yl(methyl)carbamoylsulfamoyl]benzoate 

Chemical Abstracts name methyl 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)methylamino]carbonyl]amino]sulfonyl]benzoate 

CAS RN [101200-48-0]

Composition Tech. is >95%. 

Mol. wt.  395.4 

M.f.  C15H17N5O6S 

Form  Off-white powder with a slight pungent odour. 

M.p.  142 ℃ 

V.p.  5.2 ´ 10-5 mPa (25 ℃) 

KOW  logP = 0.78 (pH 7, 25 ℃) 

Henry 1.03 ´ 10-8 Pa m3 mol-1 

S.g./density 1.46 (20 ℃) 

Solubility  In water 0.05 (pH 5), 2.04 (pH 7), 18.3 (pH 9) (g/l, 20 ℃). In acetone 3.91 ´ 104, acetonitrile 4.64 ´ 104, ethyl acetate 1.63 ´ 104, n-heptane 20.8, methanol 2.59 ´ 103 (mg/l, 20℃).   

Mode of action

Selective, post-emergence herbicide, acting primarily through foliar uptake, with little or no soil activity. Symptoms of chlorosis appear in affected weeds in days with necrosis and death occuring after 10-25 days under optimal conditions. 

Uses

Post-emergence control of broad-leaved weeds in cereal crops, including wheat, barley, oats, rye and triticale, at 7.5-30 g/ha.