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Insecticides and acaricides

Pyrethrins

Also known as Pyrethroid, Pyrethres, Mosquitoes Prevent

CAS 8003-34-7Formula C43H56O8Molar mass 700.91 g/molEC 232-319-8
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 25 suppliers listed Drug substance
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Pyrethrins chemical structure, C43H56O8, CAS 8003-34-7
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Refined extract is pale yellow mobile oil, unrefined extract is a dark greenish brown vi…
Boiling point
170 °C
Density
0.80-0.90 g/cm³ (25% pale extract), 0.90-0.96 g/cm³ (50% pale extract), ca. 0.9 g/cm³ (o…
Flash point
82.2 to 87.8
Solubility
Sol in alcohol, acetone, kerosene, carbon tetrachloride, nitromethane, & ethylene dichlo…
HS code
291720
Category
Insecticides and acaricides
UN number
UN 3077
Illustrative photo, an IBC tote of amber liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Pyrethrins?

Plain description, key identifiers and synonyms

Pyrethrins, [solid] appears as colorless to white liquids (or tan dusts). Primarily a threat to the environment. Immediate steps should be taken to limit spread to the environment. Easily penetrate the soil, contaminate groundwater or nearby waterways. Toxic by inhalation, skin absorption and/or ingestion. Used as pesticide. Practically insoluble in water.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
cis-[(1S)-2-methyl-4-oxo-3-[(2Z)-penta-2,4-dienyl]cyclopent-2-en-1-yl] (1R,3R)-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylate, cis-[(1S)-2-methyl-4-oxo-3-[(2Z)-penta-2,4-dienyl]cyclopent-2-en-1-yl] (1R,3R)-3-[(E)-3-methoxy-2-methyl-3-oxoprop-1-enyl]-2,2-dimethylcyclopropane-1-carboxylate
CAS number
8003-34-7 CAS number cross-checked
EC number
232-319-8
Molecular formula
C43H56O8
INCI name
PYRETHRINS
InChIKey
VXSIXFKKSNGRRO-MXOVTSAMSA-N
InChI
InChI=1S/C22H28O5.C21H28O3/c1-7-8-9-10-15-14(3)18(12-17(15)23)27-21(25)19-16(22(19,4)5)11-13(2)20(24)26-6;1-7-8-9-10-15-14(4)18(12-17(15)22)24-20(23)19-16(11-13(2)3)21(19,5)6/h7-9,11,16,18-19H,1,10,12H2,2-6H3;7-9,11,16,18-19H,1,10,12H2,2-6H3/b9-8-,13-11+;9-8-/t2*16-,18+,19+/m11/s1
Canonical SMILES
C=CC=CCC1=C(C)C(OC(=O)C2C(C=C(C)C(=O)OC)C2(C)C)CC1=O.C=CC=CCC1=C(C)C(OC(=O)C2C(C=C(C)C)C2(C)C)CC1=O
Isomeric SMILES
CC1=C(C(=O)C[C@@H]1OC(=O)[C@@H]2[C@H](C2(C)C)C=C(C)C)C/C=C\C=C.CC1=C(C(=O)C[C@@H]1OC(=O)[C@@H]2[C@H](C2(C)C)/C=C(\C)/C(=O)OC)C/C=C\C=C

Synonyms

  • Pyrethroid
  • Pyrethres
  • Mosquitoes Prevent
  • Pyrethrins and Pyrethroids
  • Chrysanthemum cinerariifolium
  • Tanacetum cinerariifolium pyrethrins extract
  • Chrysanthemum cinerariifolium pyrethrins extract
  • Pyrethrins (te
  • Pyrethrum?extract

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
Refined extract is pale yellow mobile oil, unrefined extract is a dark greenish brown viscous liquid, powder (groundexp.
Odour
Characteristic odor of carrierexp.
Boiling point
170 °Cexp.
Density
0.80-0.90 g/cm³ (25% pale extract), 0.90-0.96 g/cm³ (50% pale extract), ca. 0.9 g/cm³ (oleoresin crude)exp.
Flash point
82.2 to 87.8exp.
Solubility
Sol in alcohol, acetone, kerosene, carbon tetrachloride, nitromethane, & ethylene dichloride, insol in waterexp.
Vapour pressure
VP: Essentially 0 torr at 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
700.91 g/molcalc.
Exact mass
700.3975 Dacalc.
LogP (octanol/water)
8.27calc.
Topological polar surface area
113 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
8calc.
Rotatable bonds
13calc.
Heavy atoms
51calc.
Rings
4calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.51calc.
Formal charge
0calc.
Stereocentres
6calc.
Components
2calc.
Lipinski rule of five
Fails (2 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=C1C=CC(OC(=O)C2CC2)C1

O=C1C=CC(OC(=O)C2CC2)C1

2 rings, 12 atoms.

55 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

  • H302 + H312 + H332Harmful if swallowed. Harmful in contact with skin. Harmful if inhaled.
  • H302Harmful if swallowed.
  • H312Harmful in contact with skin.
  • H332Harmful if inhaled.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (15)
  • 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.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3077

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

Pyrethrins suppliers

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Where suppliers are based

25 suppliers in 7 countries

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Pyrethrins 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

Pyrethrins are botanical insecticides ... used in these four general ways: (i) pre-harvest and postharvest uses on many agricultural crops, (ii) direct and indirect treatments of livestock animals and premises, (iii) treatments of commercial and industrial facilities and storage areas where raw and processed food/feed commodities are stored or processed, and (iv) wide area mosquito abatement use in areas which include aquatic areas. (Pyrethrins).

Because of their safety, pyrethrum extracts are used extensively in stock sprays, aerosols, industrial sanitation sprays, and to protect stored food in warehouses. (Pyrethrins).

Household insecticide.

Use classes: Insecticides.

Cosmetic ingredient, INCI name PYRETHRINS(not reported)

Pharmacological actions

  • Insecticides

Roles

  • insecticide
  • pesticide
  • phytogenic insecticide

Functional uses

  • Biocide
  • Pharmaceutical

Cosmetic functions

  • Not reported

How it is made

Pyrethrum concentrates are prepared by extracting the flowers (Chrysanthemum cinerariaefolium and C. coccineum (Compositae)) with petroleum ether, ethylene dichloride, methanol, acetone, or acetic acid. The extracts are purified from waxes by reextraction with nitromethane or methanol, and absorption on activated charcoal, to produce a 25% pyrethrum concentrate containing about 10% pyrethrin I, 9% pyrethrin II, 2% cinerin I, 3% cinerin II, 1% jasmolin I, and 1.1% jasmolin II.

The pyrethrins are localized in the secretory ducts of the achenes ...

Read more

The flowers are hand picked when four or five rows of disc florets are open, and each flower contains about 3-4 mg pyrethrins. After drying in the sun or mechanically, the flowers are ground and extracted with hexane. Evaporating the hexane yields a dark, viscous oleoresin concentrate containing about 30% pyrethrins. The concentrate is either diluted with plant or mineral oil to 25% pyrethrins (oleoresin extract) or purified by methanol extraction and charcoal treatment to produce a dewaxed and decolorized refined extract.

Obtained by extraction of chrysanthemum flowers native to Kenya, Ecuador and Japan. The solvent used is a hydrocarbon of the kerosene type. Pyrethrum is also made synthetically.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • Active ingredient in FDA approved drug labels

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2917.20Indicative HS code

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

World exports in 2024
$338M
+10.9% vs 2023, imports $464M
2019 to 2024
Top exporters
  1. China37.1%
  2. United States16.2%
  3. Italy15.5%
Top importers
  1. India * partner reported11.6%
  2. China9.4%
  3. Germany8.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Pyrethrins?

Pyrethrins, [solid] appears as colorless to white liquids (or tan dusts). Primarily a threat to the environment. Immediate steps should be taken to limit spread to the environment. Easily penetrate the soil, contaminate groundwater or nearby waterways. Toxic by inhalation, skin absorption and/or ingestion.

What is the CAS number of Pyrethrins?

The CAS registry number of Pyrethrins is 8003-34-7.

What is the molecular formula and weight of Pyrethrins?

The molecular formula of Pyrethrins is C43H56O8 and its molar mass is 700.91 g/mol.

What is Pyrethrins used for?

Pyrethrins are botanical insecticides ... used in these four general ways: (i) pre-harvest and postharvest uses on many agricultural crops, (ii) direct and indirect treatments of livestock animals and premises, (iii) treatments of commercial and industrial facilities and storage areas where raw and processed food/feed…

Is Pyrethrins hazardous?

Pyrethrins carries the GHS signal word "Warning". Main hazards: harmful if swallowed. harmful in contact with skin. harmful if inhaled, harmful if swallowed, harmful in contact with skin. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Pyrethrins?

Pyrethrins is usually classified under HS code 291720 (Cyclanic, cyclenic or cycloterpenic polycarboxylic acids, their anhydrides, halides…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Pyrethrins?

CompoundList lists 25 suppliers of Pyrethrins in United States, China, Spain, Australia and 3 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Pyrethrins in India?

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

What is the price of Pyrethrins?

Suppliers quote Pyrethrins 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 Pyrethrins

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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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