Tris(4-methylphenyl) phosphite

Also known as: Tri-p-tolyl phosphite, Phosphorous acid, tris(4-methylphenyl) ester, Tri-p-cresyl phosphite, Phosphorous acid tri-p-cresyl ester, Phosphorous acid tri-p-tolyl ester, Tris(4-methylphenoxy)phosphine, NSC 4054

Tris(4-methylphenyl) phosphite (CAS 620-42-8) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C21H21O3P and a molecular weight of 352.36300 g/mol. Key properties include a melting point of 52°C, a boiling point of 238ºC (7 mmHg), a density of 1.11 and a flash point of 93ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 620-42-8
Jingsj CID: J-886732-1
Molecular Formula: C₂₁H₂₁O₃P
Molecular Weight: 352.36300 g/mol
Category: Solvents
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	52°C
Boiling Point	238ºC (7 mmHg)
Density	1.11
Flash Point	93ºC
Exact Mass	352.12300
PSA	41.28000
LogP	6.37550
Appearance	solid
Refractive Index	1.5724-1.5744

Customs & Trade Information

HS Code	2920901900
Summary	2920901900 VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Tris(4-methylphenyl) phosphite?

The CAS number of Tris(4-methylphenyl) phosphite is 620-42-8.

What are the molecular formula and molecular weight of Tris(4-methylphenyl) phosphite?

Tris(4-methylphenyl) phosphite has molecular formula C21H21O3P and molecular weight 352.36300 g/mol.

What are the upstream and downstream products of Tris(4-methylphenyl) phosphite?

For Tris(4-methylphenyl) phosphite, Upstream Products: p-Cresol, Phosphorus trichloride; Downstream Products: Tris(4-methylphenyl) phosphate, 4-Chlorotoluene.

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. "Tris(4-methylphenyl) phosphite (CAS 620-42-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-886732-1 (accessed 2026-11-09).

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