Esfenvalerate

Also known as: Sumi-alpha, Sumi-alfa, Asana, Asana XL, Hallmark, Fertialpha, Foralpha, Amicidin Super, S,S-fenvalerate, Fenvalerate (S,S)-isomer, (S)-Cyano(3-phenoxyphenyl)methyl (2S)-2-(4-chlorophenyl)-3-methylbutanoate, (S)-a-Cyano-3-phenoxybenzyl (S)-2-(4-chlorophenyl)-3-methylbutyrate

Esfenvalerate (CAS 66230-04-4) is a compound in the Esters category listed in the Jingsj chemical database. It has the molecular formula C25H22ClNO3 and a molecular weight of 419.900 g/mol. Key properties include a melting point of 59°C, a boiling point of 538.9±50.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 279.7±30.1 °C. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H331 — Toxic if inhaled and H317 — May cause an allergic skin reaction. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 66230-04-4
Jingsj CID: J-29560-2
Molecular Formula: C₂₅H₂₂ClNO₃
Molecular Weight: 419.900 g/mol
Category: Esters
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	59°C
Boiling Point	538.9±50.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	279.7±30.1 °C
Exact Mass	419.128815
PSA	59.32000
LogP	6.68
Vapor Pressure	0.0±1.4 mmHg at 25°C
Refractive Index	1.586

GHS Safety & Compliance

Acute Toxicity / Environmental HazardSignal word: Danger

H301 — Toxic if swallowed
H331 — Toxic if inhaled
H317 — May cause an allergic skin reaction
H410 — Very toxic to aquatic life with long lasting effects

Activity & Biological Data

Additional Information	[1]. Anne-Marie Saillenfait, et al. The Pyrethroid Insecticides Permethrin and Esfenvalerate Do Not Disrupt Testicular Steroidogenesis in the Rat Fetus. Toxicology. 2018 Dec 1;410:116-124.

Customs & Trade Information

HS Code	2926909090
Summary	HS:2926909090 other nitrile-function compounds VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Esfenvalerate?

The CAS number of Esfenvalerate is 66230-04-4.

What are the molecular formula and molecular weight of Esfenvalerate?

Esfenvalerate has molecular formula C25H22ClNO3 and molecular weight 419.900 g/mol.

Is Esfenvalerate hazardous?

Esfenvalerate has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H331 — Toxic if inhaled; H317 — May cause an allergic skin reaction.

What are the upstream and downstream products of Esfenvalerate?

For Esfenvalerate, Upstream Products: 3-Phenoxybenzaldehyde, 2-(4-Chlorophenyl)-3-methylbutanoyl chloride, alpha-Hydroxy-3-phenoxybenzeneacetonitrile.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Esfenvalerate (CAS 66230-04-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29560-2 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.