The information in this profile may be out-of-date. It was last revised in 1996. EXTOXNET no longer updates this information, but it may be useful as a reference or resource.

Please visit the National Pesticide Information Center (NPIC) to find updated pesticide fact sheets. If you don't find a fact sheet related to your question, feel free to call 1-800-858-7378. NPIC is open five days a week from 8:00am to 12:00pm Pacific Time.


Extension Toxicology Network

Pesticide Information Profiles

A Pesticide Information Project of Cooperative Extension Offices of Cornell University, Oregon State University, the University of Idaho, and the University of California at Davis and the Institute for Environmental Toxicology, Michigan State University. Major support and funding was provided by the USDA/Extension Service/National Agricultural Pesticide Impact Assessment Program.

EXTOXNET primary files maintained and archived at Oregon State University

Revised June 1996


Trade and Other Names: Trade names for products containing sulfomturon-methyl include Oust Weed Killer and DPX 5648.

Regulatory Status: Sulfometuron-methyl is a General Use Pesticide (GUP). It is EPA toxicity class III - slightly toxic. Products containing this compound require the Signal Word CAUTION on their labels.

Chemical Class: sulfonylurea

Introduction: Sulfometuron-methyl is a broad-spectrum sulfonylurea herbicide. It is used for the control of annual and perennial grasses and broad leaved weeds in non-crop land. It also has forestry applications where it is used to control woody tree species. It is applied either post-emergent or pre-emergent. It works by blocking cell division in the active growing regions of stem and root tips (meristematic tissue).

Formulation: Not Available

Toxicological Effects:

Ecological Effects:

Environmental Fate:

Physical Properties:

Exposure Guidelines:

Basic Manufacturer:

DuPont Agricultural Products
Walker's Mill, Barley Mill Plaza
P.O. Box 80038
Wilmington, DE 19880-0038


References for the information in this PIP can be found in Reference List Number 9

DISCLAIMER: The information in this profile does not in any way replace or supersede the information on the pesticide product labeling or other regulatory requirements. Please refer to the pesticide product labeling.