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Insecticides and acaricides

Resmethrin

Also known as For-syn, Benzofuroline, Chryson

CAS 10453-86-8Formula C22H26O3Molar mass 338.45 g/molEC 233-940-7
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 5 suppliers listed
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Resmethrin chemical structure, C22H26O3, CAS 10453-86-8
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Waxy off-white to tan solid
Melting point
56.5 °C
Boiling point
>180
Density
Relative density (water = 1): 0.96
Solubility
Insol in water at 25 °C, methylene chloride at 25 °C: greater than 50% wt/wt, in acetone…
HS code
293219
Category
Insecticides and acaricides
UN number
UN 3082
Illustrative photo, wax pastilles in a kraft paper sack in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Resmethrin?

Plain description, key identifiers and synonyms

Resmethrin is a member of furans and a cyclopropanecarboxylate ester. It has a role as an agrochemical and a pyrethroid ester insecticide. It is functionally related to a chrysanthemic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(5-benzylfuran-3-yl)methyl 2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylate
CAS number
10453-86-8 CAS number cross-checked
EC number
233-940-7
Molecular formula
C22H26O3
UNII
Z6PN6KTG4K
MDL number
MFCD00041806
INCI name
RESMETHRIN
InChIKey
VEMKTZHHVJILDY-UHFFFAOYSA-N
InChI
InChI=1S/C22H26O3/c1-15(2)10-19-20(22(19,3)4)21(23)25-14-17-12-18(24-13-17)11-16-8-6-5-7-9-16/h5-10,12-13,19-20H,11,14H2,1-4H3
SMILES (canonical and isomeric)
CC(=CC1C(C1(C)C)C(=O)OCC2=COC(=C2)CC3=CC=CC=C3)C

Synonyms

  • For-syn
  • Benzofuroline
  • Chryson
  • Chrysron
  • Synthrin
  • Benzyfuroline
  • Penncapthrin
  • Crossfire
  • Enforcer
  • Isathrine
  • Premgard
  • Pyresthrin
  • Resmethrine
  • Resmetrina
  • SB Pennick 1382
  • Penick 1382
  • ARI-B
  • S.B. Penick 1382
  • 5-Benzylfurfuryl chrysanthemate
  • NRDC 104
  • Combat White Fly Insecticide
  • ENT 27474
  • FMC 17370
  • NIA 17370
  • (5-benzylfuran-3-yl)methyl 2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropane-1-carboxylate
Show all 39 synonyms
  • Bioresmethhrin
  • Isatrin
  • Dimethyl 3-(2-methyl-1-propenyl)cyclopropanecarboxylate
  • 5-Benzyl-3-furylmethyl (1RS,3RS, 1RS,3SR)-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropanecarboxylate
  • (5-Benzyl-3-furyl)methyl 2,2-dimethyl-3-(2-methylpropenyl)cyclopropanecarboxylate
  • (5-(Phenylmethyl)-3-furanyl)methyl 2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylate
  • (5-Benzyl-3-furyl) methyl-2,2-dimethyl-3-(2-methylpropenyl)-cyclopropanecarboxylate
  • (5-benzylfuran-3-yl)methyl 2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylate
  • Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methylpropenyl)-, (5-benzyl-3-furyl)methyl ester
  • Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methyl-1-propenyl)-, (5-(phenylmethyl)-3-furanyl)methyl ester
  • Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methylpropenyl)-, (4-(2-benzyl)furyl) methyl ester
  • Penick 1390
  • Pyrethroid NRDC 107
  • Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methyl-1-propenyl)-, [5-(phenylmethyl)-3-furanyl]methyl ester

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
Waxy off-white to tan solidexp.
Odour
Chrysanthemate odorexp.
Melting point
56.5 °Cexp.
Boiling point
>180exp.
Density
Relative density (water = 1): 0.96exp.
Solubility
Insol in water at 25 °C, methylene chloride at 25 °C: greater than 50% wt/wt, in acetone at 25 °C: greater than 50% wt/wt, in ethanol and isopropanol 8 and 7%, /respectively/exp.
Vapour pressure
1.13 × 10⁻⁸ mm Hg at 30 °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
338.45 g/molcalc.
Exact mass
338.1882 Dacalc.
LogP (octanol/water)
5.15calc.
Topological polar surface area
39.44 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
6calc.
Heavy atoms
25calc.
Rings
3calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.41calc.
Formal charge
0calc.
Stereocentres
2calc.
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, O=C(OCc1coc(Cc2ccccc2)c1)C1CC1

O=C(OCc1coc(Cc2ccccc2)c1)C1CC1

3 rings, 19 atoms.

17 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (7)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3082
Transport hazard class
6.1
Packing group
III

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

Resmethrin suppliers

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All 5 suppliers
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Where suppliers are based

5 suppliers in 4 countries

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Resmethrin 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

End-use products intended for wide area mosquito abatement programs (are) Restricted Use Pesticides due to acute fish toxicity. For retail sale to and use only by certified applicators or persons under their direct supervision and only for those uses covered by the certified applicator's certification.

Resmethrin is a synthetic Type I pyrethroid insecticide registered for control of insects in residential, commercial and industrial settings, and in animal living areas. Resmethrin is also registered for use in food handling establishments and as a restricted use pesticide when used in ULV spray to control adult mosquitoes in the interest of public health.

Food uses include crack and crevice spray and enclosed space fog in food handling establishments such as food processing/handling plants, restaurants, commercial food item transportation, and food storage facilities. There are no agricultural uses registered for resmethrin.

Use classes: Insecticides, Pharmaceuticals.

Cosmetic ingredient, INCI name RESMETHRIN(antimicrobial)

Pharmacological actions

  • Insecticides

Roles

  • agrochemical
  • biophysical role
  • insecticide
  • membrane transport modulator
  • pesticide
  • pyrethroid ester insecticide
  • pyrethroid insecticide
  • sodium channel modulator

Functional uses

  • Biocide

Cosmetic functions

  • Antimicrobial

How it is made

Esterification of 5-benzyl-3-furylmethyl alcohol (British patents 1168797-9) ... containing 20-30% of the (+/-)-cis isomer and 80-90% of the (+/-)-trans.

Esterification of ethereal 5-benzyl-3-furylmethyl alcohol with (+/-)-cis,trans-chrysanthemic acid chloride in benzene. After adding pyridine, and standing overnight, water is added and the organic layer washed with sulfuric acid, potassium bicarbonate, sodium chloride, dried and then distilled.

Preparation: M. Elliott, GB 1168797, idem, US 3465007 (both 1969 to National Research Development Corporation)

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 613-060-00-3

Health and food

  • EU cosmetic ingredient inventory

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2932.19Indicative HS code

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

World exports in 2024
$2.62B
−6.4% vs 2023, imports $2.56B
2019 to 2024
Top exporters
  1. Germany57.9%
  2. Italy11.5%
  3. China10.4%
Top importers
  1. Greece40.4%
  2. Japan16.3%
  3. Germany12.8%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Resmethrin?

Resmethrin is a member of furans and a cyclopropanecarboxylate ester. It has a role as an agrochemical and a pyrethroid ester insecticide. It is functionally related to a chrysanthemic acid.

What is the CAS number of Resmethrin?

The CAS registry number of Resmethrin is 10453-86-8.

What is the molecular formula and weight of Resmethrin?

The molecular formula of Resmethrin is C22H26O3 and its molar mass is 338.45 g/mol.

What is Resmethrin used for?

End-use products intended for wide area mosquito abatement programs (are) Restricted Use Pesticides due to acute fish toxicity. For retail sale to and use only by certified applicators or persons under their direct supervision and only for those uses covered by the certified applicator's certification.

Is Resmethrin hazardous?

Resmethrin carries the GHS signal word "Warning". Main hazards: harmful if swallowed, very toxic to aquatic life, very toxic to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Resmethrin?

Resmethrin is usually classified under HS code 293219 (Compounds containing an unfused furan ring (whether or not hydrogenated) in the…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Resmethrin?

CompoundList lists 5 suppliers of Resmethrin in United States, Canada, Japan and Singapore. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Resmethrin?

Suppliers quote Resmethrin 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 Resmethrin

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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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