4-Phosphonobenzoic acid
4-膦酰基苯甲酸
Also known as: Benzoic acid,4-phosphono-, 4-Carboxyphenylphosphonic acid, p-Carboxyphenylphosphonic acid, 4-Phosphonbenzoic acid
4-Phosphonobenzoic acid (CAS 618-21-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H7O5P and a molecular weight of 202.10100 g/mol. It is also known as Benzoic acid,4-phosphono-, 4-Carboxyphenylphosphonic acid and p-Carboxyphenylphosphonic acid. Key properties include a melting point of 378 °C, a boiling point of 489.1ºC at 760 mmHg, a density of 1.65g/cm3 and a flash point of 249.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 618-21-3
- Jingsj CID
- J-1135707-4
- Molecular Formula
- C7H7O5P
- Chinese Name
- 4-膦酰基苯甲酸
- Molecular Weight
- 202.10100 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 378 °C |
|---|---|
| Boiling Point | 489.1ºC at 760 mmHg |
| Density | 1.65g/cm3 |
| Flash Point | 249.6ºC |
Frequently Asked Questions
What is the CAS number of 4-Phosphonobenzoic acid?
The CAS number of 4-Phosphonobenzoic acid is 618-21-3.
What are the molecular formula and molecular weight of 4-Phosphonobenzoic acid?
4-Phosphonobenzoic acid has molecular formula C7H7O5P and molecular weight 202.10100 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Phosphonobenzoic acid (CAS 618-21-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1135707-4 (accessed 2026-10-25).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.