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Insecticides and acaricides

Fenpyroximate

Also known as fenperoximate, FujiMite, Fenpryroximate

CAS 134098-61-6Formula C24H27N3O4Molar mass 421.50 g/molEC 601-123-8
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Hazardous to the environment 31 suppliers listed
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Fenpyroximate chemical structure, C24H27N3O4, CAS 134098-61-6
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White crystalline powder
Melting point
101.1 to 102.4
Density
1.25 g/cm³ at 20 °C
Flash point
85 °C
Solubility
In water, 2.31 × 10⁻² mg/L at 25 °C, pH 7
HS code
293319
Category
Insecticides and acaricides
Illustrative photo, off-white crystalline powder with an amber glass bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Fenpyroximate?

Plain description, key identifiers and synonyms

Fenpyroximate is a tert-butyl ester and a pyrazole acaricide. It has a role as a mitochondrial NADH:ubiquinone reductase inhibitor. It derives from a hydride of a 1H-pyrazole.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
tert-butyl 4-[[(E)-(1,3-dimethyl-5-phenoxypyrazol-4-yl)methylideneamino]oxymethyl]benzoate
CAS number
134098-61-6 CAS number cross-checkedOther or deprecated CAS: 111812-58-9
EC numbers
601-123-8, 603-792-1
Molecular formula
C24H27N3O4
UNII
9W557V4RYA
MDL number
MFCD00274596
InChIKey
YYJNOYZRYGDPNH-MFKUBSTISA-N
InChI
InChI=1S/C24H27N3O4/c1-17-21(22(27(5)26-17)30-20-9-7-6-8-10-20)15-25-29-16-18-11-13-19(14-12-18)23(28)31-24(2,3)4/h6-15H,16H2,1-5H3/b25-15+
Canonical SMILES
Cc1nn(C)c(Oc2ccccc2)c1C=NOCc1ccc(C(=O)OC(C)(C)C)cc1
Isomeric SMILES
CC1=NN(C(=C1/C=N/OCC2=CC=C(C=C2)C(=O)OC(C)(C)C)OC3=CC=CC=C3)C

Synonyms

  • fenperoximate
  • FujiMite
  • Fenpryroximate
  • Sequel
  • t-butyl (E)-alpha-(1,3-dimethyl-5-phenoxypyrazol-4-ylmethyleneaminooxy)-p-toluate
  • Benzoic acid, 4-((((E)-((1,3-dimethyl-5-phenoxy-1H-pyrazol-4-yl)methylene)amino)oxy)methyl)-, 1,1-dimethylethyl ester
  • tert-butyl 4-[({[(1E)-(1,3-dimethyl-5-phenoxy-1H-pyrazol-4-yl)methylene]amino}oxy)methyl]benzoate
  • tert-butyl 4-(((((1E)-(1,3-dimethyl-5-phenoxy-1H-pyrazol-4-yl)methylene)amino)oxy)methyl)benzoate
  • (E)-Fenpyroximate
  • Fenpyroxymate
  • tert-butyl 4-[[(E)-(1,3-dimethyl-5-phenoxypyrazol-4-yl)methylideneamino]oxymethyl]benzoate
  • Danitron
  • Ortus
  • Naja
  • Assault
  • Acari
  • Kendo
  • DL-Fenpyroximate
  • tert-Butyl 4-(((((1,3-dimethyl-5-phenoxy-1H-pyrazol-4-yl)methylene)amino)oxy)methyl)benzoate
  • tert-Butyl 4-([[(E)-1,3-dimethyl-5-phenoxypyrazol-4-yl]methyl]aminooxymethyl)benzoate
  • (E)-tert-butyl 4-(((((1,3-dimethyl-5-phenoxy-1H-pyrazol-4-yl)methylene)amino)oxy)methyl)benzoate
  • NNI 850
  • tert-Butyl 4-({[(E)-1,3-dimethyl-5-phenoxypyrazol-4-yl]methyl}aminooxymethyl)benzoate
  • t-Butyl (E)-alpha-(1,3-dimethyl-5-phenoxypyrazol-4-ylmethyleneaminooxy)-p-toluate (IUPAC)
  • Yyjnoyzrygdpnh-mfkubstisa-
Show all 35 synonyms
  • Oregon Cannabis Pesticide Mixture 10x AL 2-20 microg/mL in Acetonitrile
  • tert-butyl 4-[[(E)-(1,3-dimethyl-5-phenoxy-pyrazol-4-yl)methyleneamino]oxymethyl]benzoate
  • 4-[[[[(1,3-Dimethyl-5-phenoxy-1H-pyrazol-4-yl)methylene]amino]oxy]methyl]benzoic Acid 1,1-Dimethylethyl Ester
  • Benzoic acid, 4-(((((1,3-dimethyl-5-phenoxy-1H-pyrazol-4-yl)methylene)amino)oxy)methyl)-, 1,1-dimethylethyl ester, (E)-
  • Benzoic acid, 4-(1,3-dimethyl-5-phenoxy-1H-pyrazol-4- yl)methyleneaminooxymethyl-, 1,1-dimethylethyl ester
  • Benzoic acid,4-[[[(E)-[(1,3-dimethyl-5-phenoxy-1H-pyrazol-4-yl)methylene]amino]oxy]methyl]-, 1,1-dimethylethyl ester
  • (E)-Fenpyroximate 1000 |Ig/mL in Acetone
  • (E)-Fenpyroximate 10 |Ig/mL in Acetonitrile
  • (E)-Fenpyroximate 10 |Ig/mL in Cyclohexane
  • (E)-Fenpyroximate 10 microg/mL in Cyclohexane

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
White crystalline powderexp.
Melting point
101.1 to 102.4exp.
Density
1.25 g/cm³ at 20 °Cexp.
Flash point
85 °Cexp.
Solubility
In water, 2.31 × 10⁻² mg/L at 25 °C, pH 7exp.
Vapour pressure
7.4 × 10⁻³ mPa /5.58 × 10⁻⁸ mm Hg/ at 25 °Cexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
421.50 g/molcalc.
Exact mass
421.2002 Dacalc.
LogP (octanol/water)
5.03calc.
Topological polar surface area
74.94 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
6calc.
Rotatable bonds
7calc.
Heavy atoms
31calc.
Rings
3calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0.29calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (1 violation)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, C(=NOCc1ccccc1)c1cn[nH]c1Oc1ccccc1

C(=NOCc1ccccc1)c1cn[nH]c1Oc1ccccc1

3 rings, 22 atoms.

5 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H301Toxic if swallowed.
  • H317May cause an allergic skin reaction.
  • H330Fatal if inhaled.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (22)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P316Get emergency medical help immediately.
  • P320Specific treatment is urgent (see supplemental first aid instructions on the label).
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Fenpyroximate suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 31 suppliers
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Where suppliers are based

31 suppliers in 9 countries

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Fenpyroximate price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Acaricide/miticide, insecticide.

Use classes: Acaricides, Insecticides.

Roles

  • electron-transport chain inhibitor
  • enzyme inhibitor
  • mitochondrial NADH:ubiquinone reductase inhibitor
  • mitochondrial respiratory-chain inhibitor
  • pathway inhibitor
  • respiratory-chain inhibitor

Functional uses

  • Biocide

How it is made

Fenpyroximate is produced by reaction of tert-butyl 4-(bromomethyl)benzoate with 1,3-dimethyl-5-phenoxypyrazole-4-carboxaldehyde oxime in the presence of potassium hydroxide in dimethyl sulfoxide.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 607-713-00-1

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Fenpyroximate is traded under.

HS 2933.19Indicative HS code

Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the…

World exports in 2024
$3.44B
−22.6% vs 2023, imports $6.66B
2019 to 2024
Top exporters
  1. China21.6%
  2. Switzerland * partner reported20.5%
  3. Germany19.0%
Top importers
  1. Slovenia38.4%
  2. Portugal14.1%
  3. Brazil13.0%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Fenpyroximate is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Fenpyroximate, based on the data on this page

What is Fenpyroximate?

Fenpyroximate is a tert-butyl ester and a pyrazole acaricide. It has a role as a mitochondrial NADH:ubiquinone reductase inhibitor. It derives from a hydride of a 1H-pyrazole.

What is the CAS number of Fenpyroximate?

The CAS registry number of Fenpyroximate is 134098-61-6. Other or deprecated CAS numbers: 111812-58-9.

What is the molecular formula and weight of Fenpyroximate?

The molecular formula of Fenpyroximate is C24H27N3O4 and its molar mass is 421.50 g/mol.

What is Fenpyroximate used for?

Acaricide/miticide, insecticide. Use classes: Acaricides, Insecticides.

Is Fenpyroximate hazardous?

Fenpyroximate carries the GHS signal word "Danger". Main hazards: toxic if swallowed, may cause an allergic skin reaction, fatal if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Fenpyroximate?

Fenpyroximate is usually classified under HS code 293319 (Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Fenpyroximate?

CompoundList lists 31 suppliers of Fenpyroximate in China, Brazil, India, Japan and 5 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Fenpyroximate in India?

6 suppliers in India list Fenpyroximate on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Fenpyroximate?

Suppliers quote Fenpyroximate on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Fenpyroximate

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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