2-(Triphenylphosphoranylidene)succinic anhydride

Also known as: 2,5-Furandione, dihydro-3-(triphenylphosphoranylidene)-, 3,4-Dihydro-3-(triphenylphosphoranylidene)furan-2,5-dione, 3-(Triphenylphosphoranylidene)dihydrofuran-2,5-dione, 3-(triphenyl-λ5-phosphanylidene)oxolane-2,5-dione, EINECS 212-998-7, MFCD00005529

2-(Triphenylphosphoranylidene)succinic anhydride (CAS 906-65-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C22H17O3P and a molecular weight of 360.34200 g/mol. Key properties include a melting point of 167 °C (dec.)(lit.), a boiling point of 516.1ºC at 760mmHg, a density of 1.29g/cm3 and a flash point of 279ºC. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 906-65-0
Jingsj CID: J-22021-3
Molecular Formula: C₂₂H₁₇O₃P
Molecular Weight: 360.34200 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	167 °C (dec.)(lit.)
Boiling Point	516.1ºC at 760mmHg
Density	1.29g/cm3
Flash Point	279ºC
Exact Mass	360.09200
PSA	53.18000
LogP	2.62640
Refractive Index	1.643

GHS Safety & Compliance

IrritantSignal word: Warning

H315 — Causes skin irritation
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of 2-(Triphenylphosphoranylidene)succinic anhydride?

The CAS number of 2-(Triphenylphosphoranylidene)succinic anhydride is 906-65-0.

What are the molecular formula and molecular weight of 2-(Triphenylphosphoranylidene)succinic anhydride?

2-(Triphenylphosphoranylidene)succinic anhydride has molecular formula C22H17O3P and molecular weight 360.34200 g/mol.

Is 2-(Triphenylphosphoranylidene)succinic anhydride hazardous?

2-(Triphenylphosphoranylidene)succinic anhydride has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of 2-(Triphenylphosphoranylidene)succinic anhydride?

For 2-(Triphenylphosphoranylidene)succinic anhydride, Upstream Products: Maleic anhydride, Triphenylphosphine, benzene; Downstream Products: (2-Carboxyethyl)triphenylphosphonium chloride.

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. "2-(Triphenylphosphoranylidene)succinic anhydride (CAS 906-65-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-22021-3 (accessed 2026-11-09).

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