Diethyl (4-methoxyphenyl)phosphonate

Also known as: 4-Methoxyphenylphosphonic acid diethyl ester, Diethyl 4-methoxyphenylphosphonate, (4-Methoxyphenyl)phosphonic acid diethyl ester, Diethyl(p-methoxyphenyl)phosphonate, 1-Diethoxyphosphoryl-4-methoxybenzene

Diethyl (4-methoxyphenyl)phosphonate (CAS 3762-33-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C11H17O4P and a molecular weight of 244.22400 g/mol. Key properties include a melting point of 159-161°C, a boiling point of 159-161 °C(lit.), a density of 1.136 g/mL at 20 °C(lit.) and a flash point of 65°C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 3762-33-2
Jingsj CID: J-29280-8
Molecular Formula: C₁₁H₁₇O₄P
Molecular Weight: 244.22400 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	159-161°C
Boiling Point	159-161 °C(lit.)
Density	1.136 g/mL at 20 °C(lit.)
Flash Point	65°C
Exact Mass	244.08600
PSA	54.57000
LogP	2.58660
Refractive Index	n20/D 1.413

Customs & Trade Information

HS Code	2931900090
Summary	2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Diethyl (4-methoxyphenyl)phosphonate?

The CAS number of Diethyl (4-methoxyphenyl)phosphonate is 3762-33-2.

What are the molecular formula and molecular weight of Diethyl (4-methoxyphenyl)phosphonate?

Diethyl (4-methoxyphenyl)phosphonate has molecular formula C11H17O4P and molecular weight 244.22400 g/mol.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Diethyl (4-methoxyphenyl)phosphonate (CAS 3762-33-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29280-8 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.