fenthion

倍硫磷

Also known as: Baytex, Lebaycid, Mercaptophos, MPP, O,O-Dimethyl O-[3-methyl-4-(methylthio)phenyl] phosphorothioate, O,O-Dimethyl O-4-methylthio-m-tolyl phosphorothioate, Phenthion, ENT 25540

fenthion (CAS 55-38-9) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C10H15O3PS2 and a molecular weight of 278.328 g/mol. It is also known as Baytex, Lebaycid and Mercaptophos. Key properties include a melting point of 7.5°C, a boiling point of 330.0±52.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 153.4±30.7 °C. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 55-38-9
Jingsj CID: J-1313626-2
Molecular Formula: C₁₀H₁₅O₃PS₂
Chinese Name: 倍硫磷
Molecular Weight: 278.328 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	7.5°C
Boiling Point	330.0±52.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	153.4±30.7 °C

GHS Safety & Compliance

Acute Toxicity / Health Hazard / Environmental HazardSignal word: Danger

Frequently Asked Questions

What is the CAS number of fenthion?

The CAS number of fenthion is 55-38-9.

What are the molecular formula and molecular weight of fenthion?

fenthion has molecular formula C10H15O3PS2 and molecular weight 278.328 g/mol.

Is fenthion hazardous?

fenthion has GHS signal word Danger.

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

Last updated: 8/21/2026

How to cite: Jingsj. "fenthion (CAS 55-38-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1313626-2 (accessed 2026-10-23).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.