Octadecylphosphonic acid
磷酸正十八酯
Also known as: ODPA, stearylphosphonic acid, 1-Octadecylphosphonic acid, Octadecanephosphonic acid, n-Octadecylphosphonic acid, Phosphonic acid, octadecyl-
Octadecylphosphonic acid (CAS 4724-47-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C18H39O3P and a molecular weight of 334.47400 g/mol. It is also known as ODPA, stearylphosphonic acid and 1-Octadecylphosphonic acid. Key properties include a melting point of 100-101ºC, a boiling point of 463.6ºC at 760 mmHg, a density of 0.969 g/cm3 and a flash point of 234.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4724-47-4
- Jingsj CID
- J-35165-0
- Molecular Formula
- C18H39O3P
- Chinese Name
- 磷酸正十八酯
- Molecular Weight
- 334.47400 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 100-101ºC |
|---|---|
| Boiling Point | 463.6ºC at 760 mmHg |
| Density | 0.969 g/cm3 |
| Flash Point | 234.2ºC |
| Exact Mass | 334.26400 |
| PSA | 67.34000 |
| LogP | 6.42560 |
| Refractive Index | 1.465 |
| Additional Property | Insoluble in water. |
Frequently Asked Questions
What is the CAS number of Octadecylphosphonic acid?
The CAS number of Octadecylphosphonic acid is 4724-47-4.
What are the molecular formula and molecular weight of Octadecylphosphonic acid?
Octadecylphosphonic acid has molecular formula C18H39O3P and molecular weight 334.47400 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Octadecylphosphonic acid (CAS 4724-47-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-35165-0 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.