NOMENCLATURE Common name imazethapyr (BSI, ANSI, draft E-ISO, (m) draft F-ISO) IUPAC name (RS)-5-ethyl-2-(4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)nicotinic acid Chemical Abstracts name (-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acid CAS RN [81335-77-5] Development codes AC 263 499; CL 263 499 (both Cyanamid)


Systemic herbicide, absorbed by the roots and foliage, with translocation in the xylem and phloem, and accumulation in the meristematic regions.


Control of many major annual and perennial grass and broad-leaved weeds in soya beans and other leguminous crops. Applied pre-plant incorporated, pre-emergence, or post-emergence.

Production formulation

Imazethapyr 5%ME
Imazethapyr 20%SL
Imazethapyr 70%SP
Imazethapyr 75%WDG