3-(Diphenylphosphino)benzenesulfonic acid sodium salt
3-(Diphenylphosphino)benzenesulfonic acid sodium salt (CAS 63995-75-5), with the molecular formula C18H14NaO3PS and molecular weight 364.33, is a phosphine derivative supplied by Tech Serve Solutions. This compound is primarily utilised in chemical synthesis, particularly as a ligand in catalysis. Its structure features a diphenylphosphine group attached to a benzenesulfonic acid sodium salt moiety, offering unique properties for various chemical transformations.
- IUPAC
- Sodium 3-(diphenylphosphino)benzenesulfonate,Triphenylphosphine-3-sulfonic acid sodium salt
- Synonyms
- Sodium 3-(diphenylphosphino)benzenesulfonateTriphenylphosphine-3-sulfonic acid sodium salt

Ligand in Homogeneous Catalysis
This compound functions as a water-soluble phosphine ligand in homogeneous catalysis. It is employed in transition metal-catalyzed reactions, where its electronic and steric properties can influence reaction rates and selectivity.
Chemical Synthesis Intermediate
As a specialised phosphine compound, it serves as an intermediate in the synthesis of more complex organic molecules. Its reactivity is leveraged in various coupling reactions and functional group transformations within organic chemistry.
Precursor for Catalytic Systems
It can act as a precursor for generating catalytically active species. The phosphine moiety readily coordinates with metal centres, forming complexes useful in diverse synthetic methodologies.
| Molecular weight | 364.33 |
|---|---|
| Empirical formula | C18H14NaO3PS |
| Assay | ≥90% (31P-NMR) |
| Grade | technical |
| Impurities tested | ~10% water~5% ethanol |

Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Transport (UN / ADR) | UN 3261 8 / PGIII |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 3-(Diphenylphosphino)benzenesulfonic acid sodium salt used for?
+
This compound is primarily used as a ligand in homogeneous catalysis and as an intermediate in chemical synthesis.
What are the CAS number and molecular formula?
+
The CAS number is 63995-75-5, and the molecular formula is C18H14NaO3PS.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies this compound at a technical grade with an assay of ≥90% (31P-NMR). It contains approximately 10% water and 5% ethanol as impurities.
How should this chemical be handled and stored?
+
This compound is classified as Danger, with hazard statement H314 (Causes severe skin burns and eye damage). Handle with appropriate personal protective equipment, including gloves, eye protection, and protective clothing. Store in a well-ventilated area away from incompatible substances.
Is this chemical suitable for pharmaceutical or food applications?
+
This compound is supplied at a technical grade and is not represented as meeting USP, EP, BP, or other pharmacopoeia standards. It is intended for laboratory and industrial use.
How can I request a sample or quote?
+
To request a sample or obtain a quotation, please use the contact form on our website or call our sales department, referencing the product name and CAS number.
How is this product packed and shipped?
+
This chemical is packed and shipped according to international regulations for hazardous materials. It is classified as UN 3261, Class 8, Packing Group III.
▶ Related products

Benzeneruthenium(II) chloride dimer
Ru2(C6H6)2Cl4
Catalysis & Inorganic
Benzoylferrocene
C17H14FeO
Catalysis & Inorganic
Benzyldiphenylphosphine
C6H5CH2P(C6H5)2
Catalysis & Inorganic
Beryllium
Be
Catalysis & Inorganic
Beryllium oxide
BeO
Catalysis & Inorganic![Bicyclo[2.2.1]hepta-2,5-diene-rhodium(I) chloride dimer — chemical structure, CAS 12257-42-0; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F12257-42-0.png&w=3840&q=75)
Bicyclo[2.2.1]hepta-2,5-diene-rhodium(I) chloride dimer
Catalysis & Inorganic
![Bis[(10,11-η)-5-[(11bS)-dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl- κP4]-5H-dibenz[b,f]azepine]rhodium(I) tetrafluorobo — chemical structure, CAS 1228149-03-8; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1228149-03-8.png&w=3840&q=75)
Bis[(10,11-η)-5-[(11bS)-dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl- κP4]-5H-dibenz[b,f]azepine]rhodium(I) tetrafluorobo
1-d:1′
Catalysis & Inorganic![Bis[(2-dimethylamino)phenyl]amine nickel(II) chloride (C16H20ClN3Ni) — chemical structure, CAS 1033772-47-2; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1033772-47-2.png&w=3840&q=75)
Bis[(2-dimethylamino)phenyl]amine nickel(II) chloride
C16H20ClN3Ni
Catalysis & Inorganic▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis