Trimethylolpropane phosphite

三羟甲基丙烷亚磷酸酯

Also known as: 4-Ethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane, 4-Ethyl-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane, 1,1,1-Trishydroxymethylpropane bicyclic phosphite, 2-(Hydroxymethyl)-2-ethyl-1,3-propanediol cyclic phosphite

Trimethylolpropane phosphite (CAS 824-11-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H11O3P and a molecular weight of 162.12400 g/mol. It is also known as 4-Ethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane, 4-Ethyl-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane and 1,1,1-Trishydroxymethylpropane bicyclic phosphite. Key properties include a melting point of 50-55ºC, a boiling point of 147.9ºC at 760 mmHg and a flash point of 44.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 824-11-3
Jingsj CID: J-11107-0
Molecular Formula: C₆H₁₁O₃P
Chinese Name: 三羟甲基丙烷亚磷酸酯
Molecular Weight: 162.12400 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	50-55ºC
Boiling Point	147.9ºC at 760 mmHg
Flash Point	44.8ºC
Exact Mass	162.04500
PSA	41.28000
LogP	1.68670
Appearance	solid

Frequently Asked Questions

What is the CAS number of Trimethylolpropane phosphite?

The CAS number of Trimethylolpropane phosphite is 824-11-3.

What are the molecular formula and molecular weight of Trimethylolpropane phosphite?

Trimethylolpropane phosphite has molecular formula C6H11O3P and molecular weight 162.12400 g/mol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Trimethylolpropane phosphite (CAS 824-11-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-11107-0 (accessed 2026-10-28).

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