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Insecticides and acaricides

alpha-Cypermethrin

Also known as Aeralfam, Alfoxylate, Ultimate

CAS 67375-30-8Formula C22H19Cl2NO3Molar mass 416.30 g/molEC 265-898-0
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Serious health hazard, Hazardous to the environment 96 suppliers listed
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alpha-Cypermethrin chemical structure, C22H19Cl2NO3, CAS 67375-30-8
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Viscous yellowish brown semisolid mass
Melting point
78 to 81
Boiling point
200 °C
Density
1.28 g/ml @ 20 °C
Solubility
In water, 0.01 mg/l @ 25 °C.
HS code
292690
Category
Insecticides and acaricides
Illustrative photo, dark brown liquid in a glass bottle and beaker on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is alpha-Cypermethrin?

Plain description, key identifiers and synonyms

(1R)-cis-(alphaS)-cypermethrin is a cyclopropanecarboxylate ester. It is an enantiomer of a (1S)-cis-(alphaR)-cypermethrin.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
trans-[(S)-cyano-(3-phenoxyphenyl)methyl] (1R,3R)-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropane-1-carboxylate
CAS number
67375-30-8 CAS number cross-checkedOther or deprecated CAS: 65731-84-2
EC numbers
265-898-0, 614-054-3
Molecular formula
C22H19Cl2NO3
UNII
2TF5M1O25X, 99W8X078CA
InChIKey
KAATUXNTWXVJKI-NSHGMRRFSA-N
InChI
InChI=1S/C22H19Cl2NO3/c1-22(2)17(12-19(23)24)20(22)21(26)28-18(13-25)14-7-6-10-16(11-14)27-15-8-4-3-5-9-15/h3-12,17-18,20H,1-2H3/t17-,18+,20-/m0/s1
Canonical SMILES
CC1(C)C(C=C(Cl)Cl)C1C(=O)OC(C#N)c1cccc(Oc2ccccc2)c1
Isomeric SMILES
CC1([C@H]([C@H]1C(=O)O[C@H](C#N)C2=CC(=CC=C2)OC3=CC=CC=C3)C=C(Cl)Cl)C

Synonyms

  • Aeralfam
  • Alfoxylate
  • Ultimate
  • Alfazot
  • Bestox
  • Cismix
  • Contest
  • Dominex
  • Fastac
  • Mageos
  • Alphamethrin
  • Alfamethrin
  • Concord
  • Alphacypermethrin
  • Fastac 10 EC
  • Dudu alpha
  • Cyclopropanecarboxylic acid, 3-(2,2-dichloroethenyl)-2,2-dimethyl-, (R)-cyano(3-phenoxyphenyl)methyl ester, (1S,3S)-rel-
  • (1R cis S) and (1S cis R) enantiomeric isomer pair of alpha-Cyano-3-phenoxybenzyl-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylate
  • Beta-cypermethrin
  • (+/-)-Alphamethrin
  • Fendona
  • (S)-cyano(3-phenoxyphenyl)methyl (1R,3R)-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate
  • (1R)-cis-(alphaS)-cypermethrin
  • [(S)-cyano-(3-phenoxyphenyl)methyl] (1R,3R)-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropane-1-carboxylate
  • C22H19Cl2NO3
Show all 37 synonyms
  • alpha-Cypermetrin
  • (S)-Cyano(3-phenoxyphenyl)methyl (1R,3R)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane-1-carboxylate
  • Cyclopropanecarboxylic acid, 3-(2,2-dichloroethenyl)-2,2-dimethyl-, (S)-cyano(3-phenoxyphenyl)methyl ester, (1R,3R)-
  • (+-)-Alphamethrin
  • (1S,2S,1'R)-Cypermethrin
  • Alphaguard
  • Centaur
  • NRDC 168S
  • Astound Duo
  • Fastac Duo
  • Fastac CS
  • Cyclopropanecarboxylic acid, 3-(2,2-dichloroethenyl)-2,2-dimethyl-, cyano(3-phenoxyphenyl)methyl ester, (1R-(1alpha(S*),3alpha))-

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
Viscous yellowish brown semisolid massexp.
Melting point
78 to 81exp.
Boiling point
200 °Cexp.
Density
1.28 g/ml @ 20 °Cexp.
Solubility
In water, 0.01 mg/l @ 25 °C.exp.
Vapour pressure
1.73 × 10⁻⁵ mm Hg @ 20 °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
416.30 g/molcalc.
Exact mass
415.0742 Dacalc.
LogP (octanol/water)
6.18calc.
Topological polar surface area
59.32 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
6calc.
Heavy atoms
28calc.
Rings
3calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.27calc.
Formal charge
0calc.
Stereocentres
3calc.
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(OCc1cccc(Oc2ccccc2)c1)C1CC1

O=C(OCc1cccc(Oc2ccccc2)c1)C1CC1

3 rings, 20 atoms.

165 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)
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H301Toxic if swallowed.
  • H335May cause respiratory irritation.
  • H373May cause damage to organs through prolonged or repeated exposure.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (15)
  • 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.
  • P273Avoid release to the environment.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • 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

alpha-Cypermethrin suppliers

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Where suppliers are based

96 suppliers in 10 countries

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alpha-Cypermethrin price

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Uses and applications

What the substance is used for, by industry and function

Control of a wide range of chewing and sucking insects (particularly Lepidotera, Coleoptera, and Hemiptera) in fruit (including citrus), vegetables, vines, cereals, maize, beet, oilseed rape, potatoes, cotton, rice, soya beans, forestry, and other crops. Control of cockroaches, mosquitoes, flies, and other insect pests in public health, and flies in animal houses. Also used as an animal ectoparasiticide. Component of cypermethrin.

Roles

  • acaricide
  • agrochemical
  • antiinfective agent
  • antiparasitic agent
  • biophysical role
  • insecticide
  • membrane transport modulator
  • pesticide
  • pharmaceutical
  • pyrethroid ester acaricide
  • pyrethroid ester insecticide
  • pyrethroid insecticide
  • sodium channel modulator

How it is made

Produced from 3-phenoxybenzaldehyde cyanohydrin + (1RS)-cis-3-(2,2-dichlorovinyl-2,2-dimethylcyclopropanecarboxylic acid by esterification.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 607-422-00-X

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code alpha-Cypermethrin is traded under.

HS 2926.90Indicative HS code

Nitrile-function compounds, other

World exports in 2024
$2.15B
−13.5% vs 2023, imports $2.17B
2019 to 2024
Top exporters
  1. China35.6%
  2. France * partner reported12.7%
  3. India * partner reported11.2%
Top importers
  1. United States13.6%
  2. China12.4%
  3. Brazil11.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about alpha-Cypermethrin, based on the data on this page

What is alpha-Cypermethrin?

(1R)-cis-(alphaS)-cypermethrin is a cyclopropanecarboxylate ester. It is an enantiomer of a (1S)-cis-(alphaR)-cypermethrin.

What is the CAS number of alpha-Cypermethrin?

The CAS registry number of alpha-Cypermethrin is 67375-30-8. Other or deprecated CAS numbers: 65731-84-2.

What is the molecular formula and weight of alpha-Cypermethrin?

The molecular formula of alpha-Cypermethrin is C22H19Cl2NO3 and its molar mass is 416.30 g/mol.

What is alpha-Cypermethrin used for?

Control of a wide range of chewing and sucking insects (particularly Lepidotera, Coleoptera, and Hemiptera) in fruit (including citrus), vegetables, vines, cereals, maize, beet, oilseed rape, potatoes, cotton, rice, soya beans, forestry, and other crops.

Is alpha-Cypermethrin hazardous?

alpha-Cypermethrin carries the GHS signal word "Danger". Main hazards: toxic if swallowed, may cause respiratory irritation, may cause damage to organs through prolonged or repeated exposure. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of alpha-Cypermethrin?

alpha-Cypermethrin is usually classified under HS code 292690 (Nitrile-function compounds, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy alpha-Cypermethrin?

CompoundList lists 96 suppliers of alpha-Cypermethrin in India, China, Brazil, United States and 6 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy alpha-Cypermethrin in India?

33 suppliers in India list alpha-Cypermethrin on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of alpha-Cypermethrin?

Suppliers quote alpha-Cypermethrin 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 alpha-Cypermethrin

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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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