Diphenyl phosphite

亚磷酸二苯酯

Also known as: Diphenyl hydrogen phosphite, Diphenoxyphosphine oxide, Diphenyl phosphonate, Phosphonic acid diphenyl ester, Phosphorous acid diphenyl ester, Diphenyl H-phosphonate, Diphenylphosphite, Weston DPP, Doverphos DPP, EINECS 225-202-8, MFCD00044497

Diphenyl phosphite (CAS 4712-55-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H11O3P and a molecular weight of 234.18800 g/mol. It is also known as Diphenyl hydrogen phosphite, Diphenoxyphosphine oxide and Diphenyl phosphonate. Key properties include a melting point of 12 °C(lit.), a boiling point of 218-219 °C26 mm Hg(lit.), a density of 1.223 g/mL at 25 °C(lit.) and a flash point of 350 °F. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4712-55-4
Jingsj CID: J-15114-2
Molecular Formula: C₁₂H₁₁O₃P
Chinese Name: 亚磷酸二苯酯
Molecular Weight: 234.18800 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	12 °C(lit.)
Boiling Point	218-219 °C26 mm Hg(lit.)
Density	1.223 g/mL at 25 °C(lit.)
Flash Point	350 °F

GHS Safety & Compliance

Corrosion / IrritantSignal word: Danger

Frequently Asked Questions

What is the CAS number of Diphenyl phosphite?

The CAS number of Diphenyl phosphite is 4712-55-4.

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

Diphenyl phosphite has molecular formula C12H11O3P and molecular weight 234.18800 g/mol.

Is Diphenyl phosphite hazardous?

Diphenyl phosphite has GHS signal word Danger.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Diphenyl phosphite (CAS 4712-55-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-15114-2 (accessed 2026-10-22).

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