The information in this profile may be out-of-date.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 include Beacon, CGAA 136872, Rifle, and Tell. Primisulfuron-methyl may be found in mixes with other herbicides such as 2,4-D, dicamba, cyanazine, bromoxynil, and atrazine.

Regulatory Status: Primisulfuron-methyl is a practically nontoxic compound in EPA toxicity class IV. Labels for products containing it must bear the Signal Word CAUTION. Primisulfuron-methyl is a General Use Pesticide (GUP).

Chemical Class: substituted urea

Introduction: Primisulfuron-methyl is a selective post-emergence herbicide used to control grassy and broad leaved weeds in crop and non-crop applications. It is the methyl ester of primisulfuron, and is similar in its toxicological and environmental fate characteristics. Primisulfuron-methyl is available in wettable powders and water dispersible granules in water-soluble packets.

Formulation: Primisulfuron methyl is available in wettable powders and water dispersible granules in water-soluble packets.

Toxicological Effects:

Ecological Effects:

Environmental Fate:

Physical Properties:

Exposure Guidelines:

Basic Manufacturer:

Ciba-Geigy Corporation
P.O. Box 18300
Greensboro, NC 27419-8300


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.