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Insecticides and acaricides

Pyriproxyfen

Also known as Admiral, 2-[1-Methyl-2-(4-phenoxyphenoxy)ethoxy]pyridine, Nylar

CAS 95737-68-1Formula C20H19NO3Molar mass 321.38 g/molEC 429-800-1
GHS signal word: Warning. Pictograms: Hazardous to the environment 156 suppliers listed
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Pyriproxyfen chemical structure, C20H19NO3, CAS 95737-68-1
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless crystals
Melting point
47 ยฐC
Boiling point
318 ยฐC
Density
Density (at 20 ยฐC): 1.14 g/cmยณ
Flash point
119 ยฐC
HS code
293339
Category
Insecticides and acaricides
UN number
UN 3077
Illustrative photo, colourless crystals beside a jumbo bulk bag in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Pyriproxyfen?

Plain description, key identifiers and synonyms

Pyriproxyfen is an aromatic ether that consists of propylene glycol having a 2-pyridyl group at the O-1 position and a 4-phenoxyphenyl group at the O-3 position. It has a role as a juvenile hormone mimic. It is a member of pyridines and an aromatic ether. It is functionally related to a 4-phenoxyphenol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-[1-(4-phenoxyphenoxy)propan-2-yloxy]pyridine
CAS number
95737-68-1 CAS number cross-checked
EC numbers
429-800-1, 619-166-6
Molecular formula
C20H19NO3
UNII
3Q9VOR705O
InChIKey
NHDHVHZZCFYRSB-UHFFFAOYSA-N
InChI
InChI=1S/C20H19NO3/c1-16(23-20-9-5-6-14-21-20)15-22-17-10-12-19(13-11-17)24-18-7-3-2-4-8-18/h2-14,16H,15H2,1H3
SMILES (canonical and isomeric)
CC(COC1=CC=C(C=C1)OC2=CC=CC=C2)OC3=CC=CC=N3

Synonyms

  • Admiral
  • 2-[1-Methyl-2-(4-phenoxyphenoxy)ethoxy]pyridine
  • Nylar
  • 2-((1-(4-Phenoxyphenoxy)propan-2-yl)oxy)pyridine
  • juvinal
  • Distance
  • Sumilarv
  • Esteem
  • Nemesis
  • Knack
  • Lano Tape
  • Archer IGR
  • NyGuard IGR
  • Pluto MC
  • Distance IGR
  • Tiger 10EC
  • 4-Phenoxyphenyl (RS)-2-(2-pyridyloxy)propyl ether
  • OMS 3019
  • Cyclio
  • Juventox
  • SEIZE
  • 2-(1-Methyl-2-(4-phenoxyphenoxy)ethoxy)pyridine
  • Pyridine, 2-(1-methyl-2-(4-phenoxyphenoxy)ethoxy)-
  • 2-{[1-(4-phenoxyphenoxy)propan-2-yl]oxy}pyridine
  • Pyridine, 2-[1-methyl-2-(4-phenoxyphenoxy)ethoxy]-
Show all 34 synonyms
  • Vectra 3d component pyriproxyfen
  • Vectra felis component pyriproxyfen
  • (+--)-pyriproxyfen
  • pyriproxyfen, (+--)-
  • SK 591
  • Pyriproxifen
  • Pyriproxyfen Solution in Methanol
  • 2-[1-(4-phenoxyphenoxy)propan-2-yloxy]pyridine
  • Pyriproxyfen (Standard)

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
Colorless crystalsexp.
Taste
Faint odor (technical grade)exp.
Melting point
47 ยฐCexp.
Boiling point
318 ยฐCexp.
Density
Density (at 20 ยฐC): 1.14 g/cmยณexp.
Flash point
119 ยฐCexp.
Solubility
Solubility in water, mg/l at 20 ยฐC: 0.101 (practically insoluble)exp.
Vapour pressure
<9.8 ร— 10โปโธ mm Hg at 23 ยฐCexp.

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
321.38 g/molcalc.
Exact mass
321.1365 Dacalc.
LogP (octanol/water)
4.72calc.
Topological polar surface area
40.58 ร…ยฒcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
7calc.
Heavy atoms
24calc.
Rings
3calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0.15calc.
Formal charge
0calc.
Stereocentres
1calc.
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, c1ccc(Oc2ccc(OCCOc3ccccn3)cc2)cc1

c1ccc(Oc2ccc(OCCOc3ccccn3)cc2)cc1

3 rings, 23 atoms, the 2-[2-(4-Phenoxyphenoxy)ethoxy]pyridine ring system.

7 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (3)
  • P273Avoid release to the environment.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3077
Transport hazard class
9
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

Pyriproxyfen suppliers

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

All 156 suppliers
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Where suppliers are based

156 suppliers in 21 countries

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Pyriproxyfen 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

Insect growth regulator.

Pyriproxyfen is a potent JH mimic affecting the hormonal balance in insects, thereby resulting in strong suppression of embryogenesis, metamorphosis, and adult formation. It is used to control agricultural, veterinary, and human health pests such as whiteflies and scale insects, flies, mosquitoes, and fleas.

Veterinary medication:.

Pharmacological actions

  • Insecticides

Roles

  • growth regulator
  • insect growth regulator
  • insecticide
  • juvenile hormone mimic
  • pesticide

Functional uses

  • Biocide

How it is made

Preparation: S. Nishida et al., United Kingdom patent 2140010, eidem, United States of America patent 4751225 (1984, 1988 both to Sumitomo)

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 613-303-00-3

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2933.39Indicative HS code

Heterocyclic compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structureโ€ฆ

World exports in 2024
$9.16B
โˆ’17.9% vs 2023, imports $10.6B
2019 to 2024
Top exporters
  1. China21.5%
  2. India * partner reported12.3%
  3. Ireland11.6%
Top importers
  1. Germany14.2%
  2. United States12.8%
  3. Brazil10.1%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Pyriproxyfen?

Pyriproxyfen is an aromatic ether that consists of propylene glycol having a 2-pyridyl group at the O-1 position and a 4-phenoxyphenyl group at the O-3 position. It has a role as a juvenile hormone mimic. It is a member of pyridines and an aromatic ether. It is functionally related to a 4-phenoxyphenol.

What is the CAS number of Pyriproxyfen?

The CAS registry number of Pyriproxyfen is 95737-68-1.

What is the molecular formula and weight of Pyriproxyfen?

The molecular formula of Pyriproxyfen is C20H19NO3 and its molar mass is 321.38 g/mol.

What is Pyriproxyfen used for?

Insect growth regulator. Pyriproxyfen is a potent JH mimic affecting the hormonal balance in insects, thereby resulting in strong suppression of embryogenesis, metamorphosis, and adult formation.

Is Pyriproxyfen hazardous?

Pyriproxyfen carries the GHS signal word "Warning". Main hazards: 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 Pyriproxyfen?

Pyriproxyfen is usually classified under HS code 293339 (Compounds containing an unfused pyridine ring (whether or not hydrogenated) in theโ€ฆ). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Pyriproxyfen?

CompoundList lists 156 suppliers of Pyriproxyfen in China, Brazil, India, United States and 17 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Pyriproxyfen in India?

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

What is the price of Pyriproxyfen?

Suppliers quote Pyriproxyfen 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 Pyriproxyfen

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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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