Tris(2,4-di-tert-butylphenyl) phosphite

三(2,4-二叔丁基苯基)亚磷酸酯

Also known as: Irgafos 168, Antioxidant 168, Phosphorous acid tris(2,4-di-tert-butylphenyl) ester, Naugard B-25, Doverphos-S-480, AT-168, IRGANOX 168, MFCD00072706, EINECS 250-709-6, Tris(2,4-ditert-butylphenyl) phosphite

Tris(2,4-di-tert-butylphenyl) phosphite (CAS 31570-04-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C42H63O3P and a molecular weight of 646.922 g/mol. It is also known as Irgafos 168, Antioxidant 168 and Phosphorous acid tris(2,4-di-tert-butylphenyl) ester. Key properties include a melting point of 181-184 °C(lit.), a boiling point of 594.2±50.0 °C at 760 mmHg, a density of -0.98 and a flash point of 394.0±30.4 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 31570-04-4
Jingsj CID: J-5480-7
Molecular Formula: C₄₂H₆₃O₃P
Chinese Name: 三(2,4-二叔丁基苯基)亚磷酸酯
Molecular Weight: 646.922 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	181-184 °C(lit.)
Boiling Point	594.2±50.0 °C at 760 mmHg
Density	-0.98
Flash Point	394.0±30.4 °C

Frequently Asked Questions

What is the CAS number of Tris(2,4-di-tert-butylphenyl) phosphite?

The CAS number of Tris(2,4-di-tert-butylphenyl) phosphite is 31570-04-4.

What are the molecular formula and molecular weight of Tris(2,4-di-tert-butylphenyl) phosphite?

Tris(2,4-di-tert-butylphenyl) phosphite has molecular formula C42H63O3P and molecular weight 646.922 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. "Tris(2,4-di-tert-butylphenyl) phosphite (CAS 31570-04-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-5480-7 (accessed 2026-10-23).

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