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Common name clodinafop-propargyl
IUPAC name prop-2-ynyl (R)-2-[4-(5-chloro-3-fluoropyridin-2-yloxy)phenoxy]propionate
Chemical Abstracts name propynyl (R)-2-[4-[(5-chloro-3-fluoro-2-pyridinyl)oxy]phenoxy]propanoate
CAS RN [105512-06-9] Development codes CGA 184927 (Ciba-Geigy)
PHYSICAL CHEMISTRY
Composition (R)- isomer. Mol. wt. 349.8 M.f. C17H13ClFNO4 Form Colourless crystals. M.p. 59.5 ºC; (tech., 48.2-57.1 ºC) V.p. 3.19 ´ 10-3 mPa (25 ºC) (OECD 104) KOW logP = 3.9 (25 ºC) Henry 2.79 ´ 10-4 Pa m3 mol-1 (calc.) S.g./density 1.37 (20 °C) Solubility In water 4.0 mg/l (25 ºC). In ethanol 97, acetone 880, toluene 690, n-hexane 0.0086, n-octanol 25 (all in g/l, 25 ºC). Stability Relatively stable in acidic media at 50 ºC, hydrolyses in alkaline media; DT50 (25 ºC) 64 h (pH 7), 2.2 h (pH 9).
APPLICATIONS
Biochemistry Fatty acid synthesis inhibitor, by inhibition of acetyl CoA carboxylase (ACCase).
Mode of action Post-emergence, systemic grass herbicide. Phytotoxic symptoms appear within 1-3 weeks, affecting meristematic tissue.
Uses Used for post-emergence control of annual grasses, including Avena, Lolium, Setaria, Phalaris and Alopecurus, in cereals, at 30-60 g/ha.
Phytotoxicity Low toxicity to spring and winter wheat.