All Photos(1)



Diphenylphosphinic acid

≥98.0% (T)

Linear Formula:
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:


≥98.0% (T)


193-195 °C (lit.)
193-196 °C


0.1 M NaOH: soluble 0.5 g/10 mL, clear, colorless

SMILES string




InChI key


Looking for similar products? Visit Product Comparison Guide

General description

Diphenylphosphinic acid (DPPA, hdpp) is an organophosphinic acid compound. It finds application as a reactive flame-retardant and promoter for palladium catalytic systems. Thermal degradation of DPPA has been studied by thermogravimetric analysis (TGA) method. DPPA reacts with cadmium nitrate in dimethylformamide solvent to afford the one-dimensional coordination polymer catena-poly[[bis(dimethylformamide-κO)cadmium(II)]-bis(μ-diphenylphosphinato-κ(2)O:O′)]. It has been repoted to promote the carbonylation of nitrobenzene and aniline to diphenylurea. Ortho-lithiated DPPA can form mono ortho-functionalized derivatives by electrophilic trapping and biphenyl-2,2′-diylbis(phenylphosphinic acid) by copper catalyzed coupling.


Diphenylphosphinic acid is an important starting material for the synthesis of organophosphinic compounds. Diphenylphosphinic acid may be used for the preparation of coordination polymers, via reaction with alkaline earth metal salts in dimethylformamide (DMF) solvent:
  • [Mg3(O2PPh2)6(DMF)2]·2DMF
  • [Ca(O2PPh2)2(DMF)2]
  • [Sr(O2PPh2)2(DMF)2]
  • [Ba(O2PPh2)2(DMF)2]
It may be used for the synthesis of compounds with the Al-O-X (X = Si, P, C) motif, via reaction with LAlH2 (L = HC(CMeNAr)2, Ar = 2,6-iPr2C6H3). It may be employed as a novel co-adsorbent in dye-sensitized solar cells (DSCs) based on nanocrystalline TiO2 sensitized with N719 dye. It may be used in the synthesis of arylindium phosphinate.


5 g in glass bottle

Storage Class Code

13 - Non Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

More documents

Quotes and Ordering

Synthesis and structure of three molecular arylindium phosphinates.
Ahmad SU, et al.
Main Group Metal Chemistry, 37(5-6), 163-167 (2014)
The palladium-phenanthroline catalyzed carbonylation of nitroarenes to diarylureas: Effect of chloride and diphenylphosphinic acid.
Gasperini M, et al.
Journal of Organometallic Chemistry, 690(20), 4517-4529 (2005)
Thermal kinetics and decomposition mechanism of methylphenylphosphinic acid and diphenylphosphinic acid.
Shao X, et al.
Chemical Research in Chinese Universities, 30(6), 1028-1031 (2014)
Jeffrey A Rood et al.
Acta crystallographica Section B, Structural science, crystal engineering and materials, 70(Pt 3), 602-607 (2014-06-04)
Reaction of alkaline earth metal salts with diphenylphosphinic acid in dimethylformamide solvent afforded four coordination polymers: [Mg3(O2PPh2)6(DMF)2]·2DMF (I), [Ca(O2PPh2)2(DMF)2] (II), [Sr(O2PPh2)2(DMF)2] (III) and [Ba(O2PPh2)2(DMF)2] (IV) (where DMF is N,N-dimethylformamide). Single-crystal X-ray diffraction revealed that all four compounds produce linear chain
Pengfei Hao et al.
Dalton transactions (Cambridge, England : 2003), 41(43), 13520-13524 (2012-09-29)
The reactions of LAlH2 (L = HC(CMeNAr)2, Ar = 2,6-iPr2C6H3) (1) with diphenylsilanediol, phenylphosphonic acid, diphenylphosphinic acid, and pyrocatechol afford compounds with the Al–O–X (X = Si, P, C) motif of composition [LAl(μ-O)]2Si(Ph)2 (2), [LAl(μ-O)]2PO(Ph) (3), LAl[OPO(Ph)2]2 (4), and LAl(μ-O)2(o-C6H4)

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service