Ethyl hydrogen methylphosphonate

甲基磷酸乙酯

Also known as: Ethyl hydrogen methylphosphonate, Monoethyl methylphosphonate, EMPA, Ethyl methylphosphonate, Phosphonic acid, P-methyl-, monoethyl ester, MFCD00192159, VX acid, O-ethyl methylphosphonic acid, ethylmethylphosphonic acid, Methyl-phosphonic acid monoethyl ester

Ethyl hydrogen methylphosphonate (CAS 1832-53-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C3H9O3P and a molecular weight of 124.07600 g/mol. It is also known as Monoethyl methylphosphonate, EMPA and Ethyl methylphosphonate. Key properties include a density of 1.172 g/mL at 25 °C(lit.) and a flash point of >230 °F. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
1832-53-7
Jingsj CID
J-3974-3
Molecular Formula
C3H9O3P
Chinese Name
甲基磷酸乙酯
Molecular Weight
124.07600 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Density1.172 g/mL at 25 °C(lit.)
Flash Point>230 °F

GHS Safety & Compliance

Acute ToxicitySignal word: Danger

Frequently Asked Questions

What is the CAS number of Ethyl hydrogen methylphosphonate?

The CAS number of Ethyl hydrogen methylphosphonate is 1832-53-7.

What are the molecular formula and molecular weight of Ethyl hydrogen methylphosphonate?

Ethyl hydrogen methylphosphonate has molecular formula C3H9O3P and molecular weight 124.07600 g/mol.

Is Ethyl hydrogen methylphosphonate hazardous?

Ethyl hydrogen methylphosphonate has GHS signal word Danger.

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

Last updated:

How to cite: Jingsj. "Ethyl hydrogen methylphosphonate (CAS 1832-53-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3974-3 (accessed 2026-10-23).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.