lambda-Cyhalothrin

Also known as: λ-Cyhalothrin, Cyhalothrin, Lambda-cyhalothrin, Cyhalothrin lambda, (R)-cyano(3-phenoxyphenyl)methyl (1S,3S)-3-[(1Z)-2-chloro-3,3,3-trifluoro-1-propen-1-yl]-2,2-dimethylcyclopropanecarboxylate - (S)-cyano(3-phenoxyphenyl)methyl (1R,3R)-3-[(1Z)-2-chloro-3,3,3-trifluoro-1-propen-1-yl]-2,2-dimethylcyclopropanecarboxylate (1:1), α-cyano-3-phenoxybenzyl-3-(2-chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cyclopropanecarboxylate

lambda-Cyhalothrin (CAS 91465-08-6) is a compound in the Esters category listed in the Jingsj chemical database. It has the molecular formula C23H19ClF3NO3 and a molecular weight of 449.85600 g/mol. Key properties include a melting point of 49.2°C, a boiling point of 187-190°C, a density of 1.33 and a flash point of 255.5ºC. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H311 — Toxic in contact with skin and H330 — Fatal if inhaled. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.

CAS No.: 91465-08-6
Jingsj CID: J-1095099-3
Molecular Formula: C₂₃H₁₉ClF₃NO₃
Molecular Weight: 449.85600 g/mol
Category: Esters
Last updated: 11/2/2026

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Physicochemical Properties

Melting Point	49.2°C
Boiling Point	187-190°C
Density	1.33
Flash Point	255.5ºC
Exact Mass	898.201111
PSA	118.64000
LogP	13.08800
Refractive Index	1.574
Storage Conditions	2-8°C

GHS Safety & Compliance

Acute Toxicity / Environmental HazardSignal word: Danger

H301 — Toxic if swallowed
H311 — Toxic in contact with skin
H330 — Fatal if inhaled
H410 — Very toxic to aquatic life with long lasting effects

Activity & Biological Data

Additional Information	[1]. Barbara Nieradko-Iwanicka, et al. Effect of Lambda-Cyhalothrin on Memory and Movement in Mice After Transient Incomplete Cerebral Ischemia. Ann Agric Environ Med. 2011;18(1):41-5.

Frequently Asked Questions

What is the CAS number of lambda-Cyhalothrin?

The CAS number of lambda-Cyhalothrin is 91465-08-6.

What are the molecular formula and molecular weight of lambda-Cyhalothrin?

lambda-Cyhalothrin has molecular formula C23H19ClF3NO3 and molecular weight 449.85600 g/mol.

Is lambda-Cyhalothrin hazardous?

lambda-Cyhalothrin has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H311 — Toxic in contact with skin; H330 — Fatal if inhaled.

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

Last updated: 11/2/2026

How to cite: Jingsj. "lambda-Cyhalothrin (CAS 91465-08-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1095099-3 (accessed 2026-11-06).

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