Fluroxypyr-meptyl

Also known as: 1-methylheptyl [(4-amino-3,5-dichloro-6-fluoropyridin-2-yl)oxy]acetate, Fluroxypyr 1-methylheptyl ester, Starane, 1-Methylheptyl (4-amino-3,5-dichloro-6-fluoro-2-pyridyloxy)acetate, ((4-amino-3,5-dichloro-6-fluoro-2-pyridinyl)oxy)-acetic acid 1-methylheptyl ester, dowco433, xrm5084, UNII:9W47M4YJ3Q, Fluroxypyr MHE, Fluroxypyr methylheptyl ester, 4-Amino-3,5-dichloro-6-fluoro-2-pyridyloxyacetic acid 1-methylheptyl ester

Fluroxypyr-meptyl (CAS 81406-37-3) is a compound in the Esters category listed in the Jingsj chemical database. It has the molecular formula C15H21Cl2FN2O3 and a molecular weight of 367.243 g/mol. Key properties include a melting point of 56-57ºC, a boiling point of 431.9±40.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 215.0±27.3 °C. It is classified under GHS with signal word Warning and hazard statements H410 — Very toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 81406-37-3
Jingsj CID: J-1961358-3
Molecular Formula: C₁₅H₂₁Cl₂FN₂O₃
Molecular Weight: 367.243 g/mol
Category: Esters
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	56-57ºC
Boiling Point	431.9±40.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	215.0±27.3 °C
Exact Mass	366.091339
PSA	74.44000
LogP	6.77
Vapor Pressure	0.0±1.0 mmHg at 25°C
Refractive Index	1.523

GHS Safety & Compliance

Environmental HazardSignal word: Warning

H410 — Very toxic to aquatic life with long lasting effects

Activity & Biological Data

Additional Information	[1]. Wang L, et, al. Dissipation and residues of fluroxypyr-meptyl in rice and environment. Bull Environ Contam Toxicol. 2011 Apr;86(4):449-53. [2]. Hewitt PG, et, al. Metabolism of fluroxypyr, fluroxypyr methyl ester, and the herbicide fluroxypyr methylheptyl ester. II: in rat skin homogenates. Drug Metab Dispos. 2000 Jul;28(7):755-9.

Frequently Asked Questions

What is the CAS number of Fluroxypyr-meptyl?

The CAS number of Fluroxypyr-meptyl is 81406-37-3.

What are the molecular formula and molecular weight of Fluroxypyr-meptyl?

Fluroxypyr-meptyl has molecular formula C15H21Cl2FN2O3 and molecular weight 367.243 g/mol.

Is Fluroxypyr-meptyl hazardous?

Fluroxypyr-meptyl has GHS signal word Warning and hazard statements H410 — Very toxic to aquatic life with long lasting effects.

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. "Fluroxypyr-meptyl (CAS 81406-37-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1961358-3 (accessed 2026-11-06).

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