The information in this profile may be out-of-date.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 of this product include Basudin, Dazzel, Gardentox, Kayazol, Knox Out, Nucidol, and Spectracide. Diazinon may be found in formulations with a variety of other pesticides such as pyrethrins, lindane, and disulfoton.

Regulatory Status: Diazinon is classified as a Restricted Use Pesticide (RUP) and is for professional pest control operator use only. In 1988, EPA canceled registration of diazinon for use on golf courses and sod farms because of die offs of birds that often congregated in these areas. It is classified toxicity class II - moderately toxic, or toxicity class III - slightly toxic, depending on the formulation. Products containing diazinon bear the Signal Word WARNING or CAUTION.

Chemical Class: organophosphate

Introduction: Diazinon is a nonsystemic organophosphate insecticide used to control cockroaches, silverfish, ants, and fleas in residential, non-food buildings. Bait is used to control scavenger yellow jackets in the western U.S. It is used on home gardens and farms to control a wide variety of sucking and leaf eating insects. It is used on rice, fruit trees, sugarcane, corn, tobacco, potatoes and on horticultural plants. It is also an ingredient in pest strips. Diazinon has veterinary uses against fleas and ticks. It is available in dust, granules, seed dressings, wettable powder, and emulsifiable solution formulations.

Formulation: It is available in dust, granules, seed dressings, wettable powder, and emulsifiable solution formulations.

Toxicological Effects:

Ecological Effects:

Environmental Fate:

Physical Properties:

Exposure Guidelines:

Basic Manufacturer:

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


References for the information in this PIP can be found in Reference List Number 5

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.