4542 Clopyralid Clopyralid is a selective herbicide used for control of broadleaf weeds, especially thistles and clovers. Clopyralid is in the picolinic acid family of herbicides, which also includes aminopyralid, picloram, triclopyr, and several less common herbicides. For control of Creeping Thistle, Cirsium arvense, a noxious, perennial weed, clopyralid is one of the few effective herbicides available. It is particularly damaging to peas, tomatoes and sunflowers and can render potatoes, lettuce and spinach inedible. It does not affect members of the family Poaceae (grasses). 1702-17-6 15553 C6H3Cl2NO2 White powder. 150-152°C No indication of carcinogenicity to humans (not listed by IARC). This is a man-made compound that is used as a pesticide. 2014-08-29T06:51:40Z 2026-03-26T23:17:39Z C18779 CHEBI:62961 true OC(=O)C1=NC(Cl)=CC=C1Cl C6H3Cl2NO2 InChI=1S/C6H3Cl2NO2/c7-3-1-2-4(8)9-5(3)6(10)11/h1-2H,(H,10,11) HUBANNPOLNYSAD-UHFFFAOYSA-N 192.0 190.954083759 Exogenous Solid CHEMBL1650605 14797 CHEM003448 DTXSID9029221 NS00005373 50.190000000000005 41.4562 15.760290841132559 1 3 1 3.20265846687412 -2.826019997533357 -1 1 1.70 -1.64 4.41e+00 g/l