Hangzhou Leaflife Chemical Co., Ltd.

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CLOPYRALID

 

Herbicide:; pyridinecarboxylic acid
CLOPYRALID
NOMENCLATURE
clopyralid
Common name clopyralid (BSI, ANSI, draft E-ISO, (m) draft F-ISO);
IUPAC name 3,6-dichloropyridine-2-carboxylic acid 
Chemical Abstracts name 3,6-dichloro-2-pyridinecarboxylic acid 
Other names 3,6-DCP  CAS RN [1702-17-6]  EEC no. 216-935-4  Development codes Dowco 290 (Dow) 

clopyralid-olamine
Common name clopyralid-olamine
CAS RN [57754-85-5] 

PHYSICAL CHEMISTRY
clopyralid
Mol. wt. 192.0  M.f. C6H3Cl2NO2  Form Colourless crystals.  M.p. 151-152 ºC  V.p. 1.33 mPa (pure, 24 ºC); 1.36 mPa (tech., 25 ºC)  KOW logP = -1.81 (pH 5), -2.63 (pH 7), -2.55 (pH 9), 1.07 (unionised, 25 °C)  S.g./density 1.57 (20 ºC)  Solubility Pure (99.2%) 7.85 (in distilled water), 118 (pH 5), 143 (pH 7), 157 (pH 9) (all in g/l, 20 ºC). In acetonitrile 121, n-hexane 6, methanol 104 (all in g/kg). Forms water-soluble salts, for example potassium, solubility >300 g/l (25 ºC).  Stability Decomposes above m.p. Stable in acidic media and to light; on hydrolysis, DT50 >30 d at pH range 5-9 (25 ºC) in sterile water.  pKaF.p. No flashing exhibited in ignition test 

clopyralid-olamine
Mol. wt. 253.1  M.f. C8H10Cl2N2O3  Solubility In water 560 g/l (25 ºC).

APPLICATIONS
Biochemistry Synthetic auxin (acting like indolylacetic acid).  Mode of action Selective systemic herbicide, absorbed by the leaves and roots, with translocation both acropetally and basipetally, and accumulation in meristematic tissue. Exhibits an auxin-type reaction. Acts on cell elongation and respiration.

clopyralid
Uses Post-emergence control of many annual and perennial broad-leaved weeds of the families Polygonaceae, Compositae, Leguminosae, and Umbelliferae, in sugar beet, fodder beet, oilseed rape, maize, brassicas, onions, leeks, strawberries, flax and grassland. Provides particularly good control of creeping thistle (Cirsium arvense), perennial sow-thistle, coltsfoot, mayweeds, and Polygonum spp.  Phytotoxicity Good crop tolerance of graminaceous, cruciferous crops.  Formulation types SL.