The information in this profile may be out-of-date.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 9/95.


TRADE OR OTHER NAMES: The active ingredient phosalone is found in a variety of commercial insecticides. Trade names for products containing phosalone include Azonfene, Benzofos, Rubitox, Zolone and RP 11974 (112, 116, 174). The common name phosalone is generally recognized, except in the Soviet Union, where the common name benzphos is used (2, 125).

REGULATORY STATUS: Phosalone is no longer for sale in the U.S. (114). Phosalone was a general use pesticide (GUP). Products containing phosalone had the Signal Word "Warning" on their label.

CHEMICAL CLASS: organophosphate insecticide

INTRODUCTION: Phosalone was introduced in 1963 by Rhone-Poulenc company as a nonsystemic insecticide and acaricide for use on deciduous fruit trees, market garden crops, cotton, potatoes and rape (2,125). It is a broad-spectrum pesticide with rapid killing ability. Approximately 12-20 days control may be expected (114).

Phosalone is a member of the organophosphate family of insecticides. It is used as both an insecticide and acaricide. It comes in emulsifiable concentrate, wettable powder and dust formulations (117). It is used on nut crops, citrus, pome fruits, stone fruits, grapes, potatoes, artichokes, roses and arborvitae (174). It is active against the red spider mite on apples and pears. It controls a wide range of caterpillars and beetles on crops of economic importance as well as a number of hemiptera and hymenoptera (120).





Physical Properties:

Phosalone is stable under normal storage conditions. It is compatible with most other pesticides and is noncorrosive. It is incompatible with alkaline materials such as calcium arsenate and lime sulfur (2, 125). Phosalone emits toxic fumes of chlorine, phosphorus, nitrogen, and sulfur oxides when heated to decomposition (117).

Exposure Guidelines:


Rhone Poulenc Ag. Co.
P. O. Box 12014
Research Triangle Park, NC 27609


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 label/ing or other regulatory requirements. Please refer to the pesticide product label/ing.