Sulfentrazone 75% WDG

NOMENCLATURE
Common name sulfentrazone (BSI, pa E-ISO, ANSI)
IUPAC name 2',4'-dichloro-5'-(4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl)methanesulfonanilide 
Chemical Abstracts name N-[2,4-dichloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]phenyl]methanesulfonamide 
CAS RN [122836-35-5] 

PHYSICAL CHEMISTRY
Mol. wt. 387.2  M.f. C11H10Cl2F2N4O3S  Form Tan solid.  M.p. 121-123 ºC  V.p. 1.3 ´ 10-4 mPa (25 ºC)  KOW logP = 1.48  S.g./density 1.21 g/ml (20 ºC)  Solubility In water 0.11 (pH 6), 0.78 (pH 7), 16 (pH 7.5) (all in mg/g, 25 ºC). Soluble, to some extent, in acetone and other polar organic solvents.  Stability Stable to hydrolysis. Readily photolysed in water. 

APPLICATIONS

Biochemistry Protoporphyrinogen oxidase inhibitor (chlorophyll biosynthesis pathway). 
Mode of action Herbicide absorbed by the roots and foliage, with translocation primarily in the apoplasm, and limited movement in the phloem. 
Uses Control of annual broad-leaved weeds, some grasses and Cyperus spp. in soya beans, sugar cane and tobacco. Applied pre-emergence or pre-plant incorporated.