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2-(Diphenylphosphino)benzoic acid

Also known as: (2-Carboxyphenyl)diphenylphosphine, 2-Diphenylphosphanylbenzoic acid, o-(Diphenylphosphino)benzoic acid, DPPBAC, MFCD00674024, EINECS 241-293-7

2-(Diphenylphosphino)benzoic acid (CAS 17261-28-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C19H15O2P and a molecular weight of 306.295 g/mol. Key properties include a melting point of 174-181 °C(lit.), a boiling point of 451.0±28.0 °C at 760 mmHg and a flash point of 226.5±24.0 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H332 — Harmful if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
17261-28-8
Jingsj CID
J-25485-3
Molecular Formula
C19H15O2P
Molecular Weight
306.295 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point174-181 °C(lit.)
Boiling Point451.0±28.0 °C at 760 mmHg
Flash Point226.5±24.0 °C
Exact Mass306.080963
PSA50.89000
LogP5.37
Vapor Pressure0.0±1.2 mmHg at 25°C

GHS Safety & Compliance

IrritantSignal word: Warning
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H332 — Harmful if inhaled
  • H335 — May cause respiratory irritation

Customs & Trade Information

HS Code2916399090
Summary2916399090 other aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives 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 2-(Diphenylphosphino)benzoic acid?

The CAS number of 2-(Diphenylphosphino)benzoic acid is 17261-28-8.

What are the molecular formula and molecular weight of 2-(Diphenylphosphino)benzoic acid?

2-(Diphenylphosphino)benzoic acid has molecular formula C19H15O2P and molecular weight 306.295 g/mol.

Is 2-(Diphenylphosphino)benzoic acid hazardous?

2-(Diphenylphosphino)benzoic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H332 — Harmful if inhaled.

What are the upstream and downstream products of 2-(Diphenylphosphino)benzoic acid?

For 2-(Diphenylphosphino)benzoic acid, Upstream Products: potassium 2-chlorobenzoate, Chlorodiphenylphosphine, Methylmagnesium iodide; Downstream Products: (1R,2R)-(+)-N,N'-Bis(2-(diphenylphosphino)benzoyl)-1,2-diaminocyclohexane.

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

Last updated:

How to cite: Jingsj. "2-(Diphenylphosphino)benzoic acid (CAS 17261-28-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-25485-3 (accessed 2026-11-09).

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