2-(Dicyclohexylphosphino)benzenesulfonic acid
2-(Dicyclohexylphosphino)benzenesulfonic acid (CAS: 926936-73-4) is an organophosphorus compound with the formula C18H27O3PS and a molecular weight of 354.44 g/mol. This compound serves as a valuable ligand in catalysis, particularly in organic synthesis and inorganic chemistry applications. Its structure, featuring a phosphine group and a sulfonic acid moiety, allows for versatile coordination in various catalytic processes. Tech Serve Solutions supplies this chemical with an assay of 95%.

Ligand in Homogeneous Catalysis
As a phosphine-based ligand, 2-(Dicyclohexylphosphino)benzenesulfonic acid can coordinate with transition metals to form catalytically active species. It is employed in various organic transformations, facilitating reactions like cross-couplings and hydrogenations.
Catalyst Development
The unique combination of a bulky phosphine group and a sulfonic acid functional group makes this compound of interest in the design and development of novel homogeneous catalysts. Its properties can influence catalyst stability, activity, and selectivity.
Precursor for Specialty Chemicals
It can act as a building block or intermediate in the synthesis of more complex organophosphorus compounds and other specialty chemicals. Its functional groups offer points for further chemical modification.
| Molecular weight | 354.44 |
|---|---|
| Empirical formula | C18H27O3PS |
| Assay | 95% |
| Melting point | 262-267 °C |


Hazard statements
- H314Causes severe skin burns and eye damage
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- 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 2-(Dicyclohexylphosphino)benzenesulfonic acid used for?
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2-(Dicyclohexylphosphino)benzenesulfonic acid is primarily used as a ligand in homogeneous catalysis for various organic synthesis and inorganic chemistry applications, and as a precursor for specialty chemicals.
What is the CAS number and molecular formula for this compound?
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The CAS number is 926936-73-4, and the molecular formula is C18H27O3PS.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2-(Dicyclohexylphosphino)benzenesulfonic acid with an assay of 95%. This product is not represented as USP, BP, EP, or any other pharmacopoeia grade.
What are the safety and handling considerations for 2-(Dicyclohexylphosphino)benzenesulfonic acid?
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This compound is classified under GHS05 and GHS07, with a Danger signal word. It causes severe skin burns and eye damage (H314) and may cause respiratory irritation (H335). Handle with appropriate personal protective equipment, including gloves, eye protection, and respiratory protection, in a well-ventilated area. Refer to the Safety Data Sheet (SDS) for comprehensive handling information.
How is 2-(Dicyclohexylphosphino)benzenesulfonic acid packed and shipped?
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Products are packed and shipped according to international regulations for hazardous materials, including UN 3261 for transport. TSS ensures compliance with all relevant export and shipping requirements.
How can I request a sample or quote for 2-(Dicyclohexylphosphino)benzenesulfonic acid?
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To request a sample or a quote, please use the contact form on our website or reach out to our sales department directly. Please reference the product name and CAS number (926936-73-4).
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