tert-Butyldicyclohexylphosphine
tert-Butyldicyclohexylphosphine (CAS: 93634-87-8; Formula: C16H31P) is an organophosphorus compound with a molecular weight of 254.39 g/mol. This flammable solid is characterised by its bulky cyclohexyl and tert-butyl groups, making it a valuable ligand in homogeneous catalysis. It is primarily utilised in chemical synthesis and as a phosphine ligand in various catalytic applications.
- IUPAC
- Dicyclohexyl-tert-butylphosphine
- Synonyms
- Dicyclohexyl-tert-butylphosphine

Homogeneous Catalysis
Serves as a bulky phosphine ligand in transition metal-catalyzed reactions, such as cross-coupling and hydrogenation. Its steric and electronic properties can influence catalyst activity and selectivity.
Chemical Synthesis
Employed as a reagent or building block in the synthesis of complex organic molecules and organophosphorus compounds. Its unique structure facilitates specific reaction pathways.
Ligand Design
Used in the development and study of novel phosphine ligands for catalysis research. Its robust structure allows for exploration in demanding reaction conditions.
| Molecular weight | 254.39 |
|---|---|
| Empirical formula | C16H31P |
| Assay | 97% |
| Density | 0.939 g/mL at 25 °C(lit.) |

Hazard statements
- H250Catches fire spontaneously if exposed to air
Precautionary statements
- P222Do not allow contact with air
- P231Handle under inert gas
- P422
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Transport (UN / ADR) | UN 2845 4.2 |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F |
| Risk statements (R) | 17 |
| Safety statements (S) | 6-16-27-36/37/39 |
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 tert-Butyldicyclohexylphosphine used for?
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tert-Butyldicyclohexylphosphine is primarily used as a bulky phosphine ligand in homogeneous catalysis and in chemical synthesis.
What are the CAS number and formula for tert-Butyldicyclohexylphosphine?
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The CAS number is 93634-87-8 and the molecular formula is C16H31P.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies tert-Butyldicyclohexylphosphine with an assay of 97%. This product is not supplied as USP, BP, EP or any other pharmacopoeia grade.
How should tert-Butyldicyclohexylphosphine be handled and stored?
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tert-Butyldicyclohexylphosphine is a self-heating substance that may ignite spontaneously in air (H250). It must be handled and stored under an inert atmosphere (P222, P231) and kept away from heat and ignition sources (P210). Appropriate personal protective equipment, including eyeshields, faceshields, and suitable gloves, should be worn.
How is tert-Butyldicyclohexylphosphine packed and shipped?
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The product is classified under UN 2845 for transport. Shipping and export are handled according to relevant dangerous goods regulations for self-heating substances.
How can I request a quote or sample?
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Please contact our sales team directly via phone or email to request a quotation or a sample of tert-Butyldicyclohexylphosphine.
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