4-Methoxyphenylphosphonic Acid
4-甲氧苯基磷酸
Also known as: (4-methoxyphenyl)phosphonic acid, 4-Phosphonylanisole, p-Methoxyphenylphosphonic acid, p-Anisylphosphonic acid, MFCD00013948
4-Methoxyphenylphosphonic Acid (CAS 21778-19-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H9O4P and a molecular weight of 188.11800 g/mol. It is also known as (4-methoxyphenyl)phosphonic acid, 4-Phosphonylanisole and p-Methoxyphenylphosphonic acid. Key properties include a melting point of 47-52 °C(lit.), a boiling point of 386.2ºC at 760 mmHg, a density of 1.4g/cm3 and a flash point of 187.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 21778-19-8
- Jingsj CID
- J-27966-0
- Molecular Formula
- C7H9O4P
- Chinese Name
- 4-甲氧苯基磷酸
- Molecular Weight
- 188.11800 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 47-52 °C(lit.) |
|---|---|
| Boiling Point | 386.2ºC at 760 mmHg |
| Density | 1.4g/cm3 |
| Flash Point | 187.4ºC |
Frequently Asked Questions
What is the CAS number of 4-Methoxyphenylphosphonic Acid?
The CAS number of 4-Methoxyphenylphosphonic Acid is 21778-19-8.
What are the molecular formula and molecular weight of 4-Methoxyphenylphosphonic Acid?
4-Methoxyphenylphosphonic Acid has molecular formula C7H9O4P and molecular weight 188.11800 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Methoxyphenylphosphonic Acid (CAS 21778-19-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-27966-0 (accessed 2026-10-24).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.