Chemical name: 3,6-dichloropyridine-2-carboxylic acid
CAS no.: 1702-17-6

Structural formula:

Molecular formula: C₆H₃Cl₂NO₂
Physical & chemical property:
Physical State: Colourless crystals
Melting point: 151-152°C
Density: 1.57(20°C)
Solubility: In water 118(pH 5), 143(pH 7), 157(pH 9), (all in g/l, 20°C). In acetonitrile 121, n-hexane 6, methanol 104 (all in g/kg). Forms water-soluble salts, for example potassium, solubility > 300g/l (25°C)
Stability: Decomposes above melting point. Stable in acidic media and to light, on hydrolysis, DT50 > 30d at pH range 5-9 (25°C) in sterile water.
Specification: 95%TC, 75%WG
Uses: 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. 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 partiularyly good control of creeping thistle, perennial sow-thistle, coltsfoot, mayweeds, and Polygonum spp.