Picloram is a crystalline organic solid with a chlorine-like odor. It is used in salt form as a systemic herbicide for controlling annual weeds on crops, and in combination with 2,4-D or 2,4,5-T against perennials on non-croplands for brush control. Picloram is used to control bitterweed, knapweed, leafy spurge, locoweed, larkspur, mesquite, prickly pear, and snakeweed on rangeland in the western states. The materials in this document refer to the technical acid form unless otherwise indicated. Commercial products containing the compound include Access, Grazon, Pathway, and Tordon. It may be used in formulations with other herbicides such as bromoxynil, diuron, 2,4-D, MCPA, triclorpyr, and atrazine. It is also compatible with fertilizers.

Molecular formula: C6H3Cl3N2O2
Molecular weight: 241.5
CAS NO: 1918-02-1
Chemical Name: 4-amino-3,5,6-trichloropyridine-2-carboxylicacid
4-amino-3,5,6-trichloropicolinic acid