fenthion
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. 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. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H312 — Harmful in contact with skin and H331 — Toxic if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 55-38-9
- Jingsj CID
- J-1313626-0
- Molecular Formula
- C10H15O3PS2
- Molecular Weight
- 278.328 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical 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 |
| Exact Mass | 278.020020 |
| PSA | 94.89000 |
| LogP | 3.21 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.565 |
| Additional Property | 0.0055 g/100 mL |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H312 — Harmful in contact with skin
- H331 — Toxic if inhaled
- H341 — Suspected of causing genetic defects
- H372 — Causes damage to organs through prolonged exposure
- H410 — Very toxic to aquatic life with long lasting effects
Customs & Trade Information
| HS Code | 2930909066 |
|---|---|
| Summary | 2930909066 o,o-diethyl s-(2-(isopropylamino)-2-oxoethyl) phosphorodithioate |
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 and hazard statements H302 — Harmful if swallowed; H312 — Harmful in contact with skin; H331 — Toxic if inhaled.
What are the upstream and downstream products of fenthion?
For fenthion, Downstream Products: Fenthion sulfoxide, Fenthion-oxon-sulfone, Fenthion-oxon.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "fenthion (CAS 55-38-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1313626-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.