CompoundList

Cyclethrin

Also known as Pypyrethrin, Cyklethrin, American cyanamid-43064

CAS 97-11-0Formula C21H28O3Molar mass 328.45 g/mol
Cyclethrin chemical structure, C21H28O3, CAS 97-11-0
2D chemical structure

Key facts

What buyers check first

CAS number
97-11-0
Formula
C21H28O3
Molar mass
328.45 g/mol
HS code
291620
Category
Screening compounds

What is Cyclethrin?

Plain description, key identifiers and synonyms

Cyclethrin is a chemical substance with the molecular formula C21H28O3 and a molar mass of 328.45 g/mol. Its CAS registry number is 97-11-0. The IUPAC name is (3-cyclopent-2-en-1-yl-2-methyl-4-oxocyclopent-2-en-1-yl) 2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(3-cyclopent-2-en-1-yl-2-methyl-4-oxocyclopent-2-en-1-yl) 2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylate
CAS number
97-11-0 CAS number cross-checked
Molecular formula
C21H28O3
UNII
VY7W1V90YZ
InChIKey
YJXNJQHBVKTWCC-UHFFFAOYSA-N
InChI
InChI=1S/C21H28O3/c1-12(2)10-15-19(21(15,4)5)20(23)24-17-11-16(22)18(13(17)3)14-8-6-7-9-14/h6,8,10,14-15,17,19H,7,9,11H2,1-5H3
SMILES (canonical and isomeric)
CC1=C(C(=O)CC1OC(=O)C2C(C2(C)C)C=C(C)C)C3CCC=C3

Synonyms

  • Pypyrethrin
  • Cyklethrin
  • American cyanamid-43064
  • Cyclopentenylrethonyl chrysanthemate
  • ENT 22,952
  • 2-Cyclopentenyl-4-hydroxy-3-methyl-2-cyclopenten-1-one chrysanthemate
  • 3-(2-Cyclopenten-1-yl)-2-methyl-4-oxo-2-cyclopenten-1-yl chrysanthemumate
  • (3-cyclopent-2-en-1-yl-2-methyl-4-oxocyclopent-2-en-1-yl) 2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylate
  • Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methyl-1-propenyl)-, 3-(2-cyclopenten-1-yl)-2-methyl-4-oxo-2-cyclopenten-1-yl ester
  • Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methylpropenyl)-, ester with 2-(2-cyclopenten-1-yl)-4-hydroxy-3-methyl-2-cyclopenten-1-one
  • 2,2-Dimethyl-3-(2-methyl-1-propen-1-yl)cyclopropanecarboxylic acid 3-(2-cyclopenten-1-yl)-2-methyl-4-oxo-2-cyclopenten-1-yl ester
  • Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methyl-1-propen-1-yl)-, 3-(2-cyclopenten-1-yl)-2-methyl-4-oxo-2-cyclopenten-1-yl ester
  • 2-Methyl-5-oxo[[1,1'-bi(cyclopentane)]-1,2'-dien]-3-yl 2,2-dimethyl-3-(2-methylprop-1-en-1-yl)cyclopropane-1-carboxylate

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
328.45 g/molcalc.
Exact mass
328.2038 Dacalc.
LogP (octanol/water)
4.39calc.
Topological polar surface area
43.37 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
4calc.
Heavy atoms
24calc.
Rings
3calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.62calc.
Formal charge
0calc.
Stereocentres
4calc.
Lipinski rule of five
Passes (0 violations)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=C1CC(OC(=O)C2CC2)C=C1C1C=CCC1

O=C1CC(OC(=O)C2CC2)C=C1C1C=CCC1

3 rings, 17 atoms.

No other chemical in our database has this scaffold.

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

Cyclethrin suppliers

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Cyclethrin 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

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2916.20Indicative HS code

Cyclanic, cyclenic or cycloterpenic monocarboxylic acids, their anhydrides, halides…

World exports in 2024
$489M
−6.1% vs 2023, imports $608M
2019 to 2024
Top exporters
  1. China45.5%
  2. India * partner reported18.6%
  3. Japan11.2%
Top importers
  1. Brazil20.3%
  2. United States15.7%
  3. India * partner reported12.8%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Cyclethrin?

Cyclethrin is a chemical substance with the molecular formula C21H28O3 and a molar mass of 328.45 g/mol. Its CAS registry number is 97-11-0. The IUPAC name is (3-cyclopent-2-en-1-yl-2-methyl-4-oxocyclopent-2-en-1-yl) 2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylate.

What is the CAS number of Cyclethrin?

The CAS registry number of Cyclethrin is 97-11-0.

What is the molecular formula and weight of Cyclethrin?

The molecular formula of Cyclethrin is C21H28O3 and its molar mass is 328.45 g/mol.

What is Cyclethrin used for?

Known uses and roles of Cyclethrin include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Cyclethrin hazardous?

No GHS hazard classification for Cyclethrin is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Cyclethrin?

Cyclethrin is usually classified under HS code 291620 (Cyclanic, cyclenic or cycloterpenic monocarboxylic acids, their anhydrides, halides…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Cyclethrin?

Post a free request on CompoundList and suppliers of Cyclethrin will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Cyclethrin?

Suppliers quote Cyclethrin 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 Cyclethrin

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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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