Trioctylphosphine
Also known as: Tri-n-octylphosphine, TOP, Phosphine, trioctyl-, trioctylphosphane, CYTOP 380, NSC 102529, TL 411, MFCD00015298, EINECS 225-234-2
Trioctylphosphine (CAS 4731-53-7) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C24H51P and a molecular weight of 370.635 g/mol. Key properties include a melting point of -60ºC, a boiling point of 445.0±14.0 °C at 760 mmHg, a density of 0.831 g/mL at 25 °C(lit.) and a flash point of 236.0±26.4 °C. It is classified under GHS with signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4731-53-7
- Jingsj CID
- J-3371-6
- Molecular Formula
- C24H51P
- Molecular Weight
- 370.635 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -60ºC |
|---|---|
| Boiling Point | 445.0±14.0 °C at 760 mmHg |
| Density | 0.831 g/mL at 25 °C(lit.) |
| Flash Point | 236.0±26.4 °C |
| Exact Mass | 370.372833 |
| PSA | 13.59000 |
| LogP | 11.98 |
| Vapor Pressure | 0.0±1.0 mmHg at 25°C |
| Refractive Index | n20/D 1.468(lit.) |
GHS Safety & Compliance
- H314 — Causes severe skin burns and eye damage
Frequently Asked Questions
What is the CAS number of Trioctylphosphine?
The CAS number of Trioctylphosphine is 4731-53-7.
What are the molecular formula and molecular weight of Trioctylphosphine?
Trioctylphosphine has molecular formula C24H51P and molecular weight 370.635 g/mol.
Is Trioctylphosphine hazardous?
Trioctylphosphine has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Trioctylphosphine (CAS 4731-53-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3371-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.