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Carfentrazone-ethyl 91% technical
HRAC  E WSSA  14; triazolinone

Carfentrazone-ethyl 91% technical


Common name carfentrazone-ethyl (BSI, pa ISO, ANSI)
IUPAC name ethyl (RS)-2-chloro-3-[2-chloro-5-(4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl)-4-fluorophenyl]propionate 
Chemical Abstracts name ethyl a,2-dichloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorobenzenepropanoate 
CAS RN [128621-72-7] (for the acid); [128639-02-1] (for the ethyl ester) 

Mol. wt. 412.2  M.f. C15H14Cl2F3N3O3; C13H10Cl2F3N3O3 for acid  Form Viscous yellow liquid.  M.p. -22.1 ºC  B.p. 350-355 ºC/760 mmHg  )  KOW logP = 3.36   S.g./density 1.457 (20 ºC)  Solubility In water 12 mg/ml (20 ºC), 22 mg/ml (25 ºC), 23 mg/ml (30 ºC). In toluene 0.9, hexane 0.03 (both in g/ml, 20 °C); miscible with acetone, ethanol, ethyl acetate and methylene chloride.  Stability Hydrolytic DT50 3.6 h (pH 9), 8.6 d (pH 7), stable (pH 5). Aqueous photolytic DT50 8 d.  F.p. >110 ºC 


Biochemistry Acts by inhibition of protoporphyrinogen oxidase, leading to membrane disruption.  Mode of action Absorbed by foliage, with limited translocation.  Uses Post-emergence control in cereals of a wide range of broad-leaved weeds, especially Galium aparine, Abutilon theophrasti, Ipomoea hederacea var. hederacea, Chenopodium album and several mustard species, at 9-35 g/ha.  Phytotoxicity Good tolerance in wheat, barley and rice.  Formulation types EC; SG; WG.


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