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Home » Etofenprox 2-(4-ethoxyphenyl)- 2-methylpropyl 3-phenoxybenzyl ether
Etofenprox 2-(4-ethoxyphenyl)- 2-methylpropyl 3-phenoxybenzyl ether

Etofenprox™ Advantages and Properties

Etofenprox or 2-(4-ethoxyphenyl)-2-methylpropyl 3-phenoxybenzyl ether is a new type of insecticide with low mammalian toxicity. The active ingredient etofenprox is a unique CHO compound consisting of carbon, hydrogen and oxygen. The Etofenprox formulations are compatible with most insecticide and fungicide, have shown no phytotoxicity at recommended rates and dilutions, and are stable under normal weather conditions as well as in rainfast.

Etofenprox Insecticide Advantages

There are numerous advantages to using this innovative insecticide including:

  • "CHO compound" consists of carbon, hydrogen and oxygen
  • Wide range of insecticidal spectrum
  • Rapid knockdown activity
  • Long persistent protection
  • Very low mammalian toxicity
  • No irritation
  • Low impact on environment
  • Low risk on phytotoxicity
  • Low risk on pest resurgence
  • Short "Pre-Harvest Interval (PHI)"
  • Compatible with IPM program

Etofenprox Chemical and Physical Properties

Chemical Name: 2-(4-ethoxyphenyl)-2-methylpropyl 3-phenoxybenzyl ether
Common Name: Etofenprox
Code Number: MTI-500
Molecular Formula: C25H28O3
Molecular weight is 376.5


Solubility <1ppb (water)
soluble in a range of common solvents at 25ºC
Melting Point 36.4-37.5ºC (97.5-99.5ºF)
Appearance White Crystalline solid
Odor No characteristic odor
Vapor pressure 2.4 x 10-4mmHg (100ºC)
Stability Stable in acidic and alkaline conditions


Formulation Available Concentration Available
Emulsifiable concentrate (EC) 10, 20, 30
Wettable powder (WP) 20
Emulsion, Oil in water (EW) 10
Dustable powder (DP) 0.5
Granule (GR) 1.0, 1.5

PHI (Pre-Harvest Interval)

PHI of Etofenprox 20EC to various crops on the registration in Japan is shown in this table:

Crops PHI (days) Number of
Crops PHI (days) Number of
Rice 21 3 Sweet pepper 1 3
Cereal 14 2 Tomato 1 2
Maize 7 4 Cucumber 1 3
Potato 7 3 Melon 3 4
Soybean 14 2 Cabbage 3 3
Pea 1 2 Radish 21 3
Beet 14 3 Lettuce 14 3
Citrus 14 3 Tobacco - 2
Tea 21 2 Ornamental - 6
Eggplant 1 3      


1. Acute Toxicity

Etofenprox has a very low toxicity to rats tested irrespective of sex.

Acute toxicity of Etofenprox in rats

Route LD50 (mg/kg)
Oral >42,880
Dermal >2,140
Subcutaneous >32,160
Intraperitoneal >42,880
Inhalation >5,900mg/m3

The WHO recommended classification of pesticides by hazard: unlikely to present acute hazard in normal use.

2. Skin and Eye Irritation

Skin and eye irritation studies with rabbits into the active ingredient of technical grade indicated that it caused no irritations.

3. Chronic Toxicity

Life-span feeding studies with Etofenprox in rats, mice and dogs were conducted and no adverse effects were observed.
Mutagenicity, teratogenicity and three- generation reproduction studies showed no noticeable abnormalities.



1. Aquatic Organism Toxicity

Etofenprox has a very low toxicity

Toxicity of Etofenprox on aquatic animals

Species TLm value
(ppm, 48 hrs.)
Carp 5.0
Goldfish 1.73
Ayu fish 1.2
Water flea >40 (3hrs.)
Short-heched clam 490

2. Bird Toxicity

Mallard Duck LD50 >2,000mg/kg

Soil Decomposition

  • Soil decomposition studies showed that the half-life of Etofenprox was approximately 1-3 weeks in aerobic soils.
  • The leaching test on soils revealed that Etofenprox was not leached out. It was concluded that Etofenprox did not flow into the aquatic environment.


The information contained in this website is, to the best of our knowledge, accurate and reliable, but all suggestions are made without warranty, either express or implied. The values relevant to properties or the like of the product stated herein were obtained using field test specimens prepared at official organizations in some countries and are not assumed to be identical to values obtained on the finished product manufactured by our customers and on our finished product tested by our customers in a different condition. Nothing herein shall be construed as permission or as recommendation for uses which infringe valid patents or as extending a license under valid patents. Because the conditions and methods of use on the part of our customers are beyond our control, Mitsui Chemicals, Inc. disclaims any liability incurred in connection with the use of our products.


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