Tris(4-bromophenyl)phosphine (CAS 29949-81-3) is a phosphorus ligand used in cross-coupling, amination and coordination chemistry, supplied at 97.0% purity as white powder, with a batch COA and SDS issued against the specification you agree.
Specifications
| Property | Specification |
|---|---|
| Appearance | white powder |
| Purity | 97.0% |
| CAS number | 29949-81-3 |
| Molecular formula | C18H12Br3P |
| Molecular weight | 499.0 g/mol |
| PubChem CID | 4244444 |
| SMILES | C1=CC(=CC=C1P(C2=CC=C(C=C2)Br)C3=CC=C(C=C3)Br)Br |
Where it is used
- Aryl phosphine with para-bromo handles.
- Palladium-catalysed C-N and C-C coupling (Buchwald-Hartwig, Suzuki, amination of aryl halides)
- Coordination chemistry and catalyst screening, where electron density and steric bulk are tuned by choice of aryl substituent
Reading the specification
Two specification lines decide whether a phosphine ligand works. Purity by 31P NMR or HPLC matters because the free phosphine oxidises to the phosphine oxide, which is a different ligand and usually an inactive one; a nominal 99% by HPLC can still hide oxide if the method does not separate the two. Water and residual solvent matter in catalysis because they poison metal centres and shift selectivity. Buy on an assay that states the method, and ask for the oxide content if the ligand has been stored open.
Packaging and supply
Supplied in research quantities from 1 g and 5 g through 25 g and 100 g, with scale-up to bulk packed under nitrogen or argon where the product allows it. Every lot ships with a batch COA and the current SDS, FOB or CIF against destination. If you need a specific assay method, a water limit, an enantiomeric purity figure or a metal-residue limit, state it at enquiry stage – the batch documentation is issued against the specification you agree.
Handling: Use gloves, eye protection and local ventilation. Avoid dust generation, keep containers closed when not in use, and refer to the SDS for first aid, storage and disposal.
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- 4,5-Bis(diphenylphosphino)-9,9-dimethylxanthene (CAS 161265-03-8)
- 2-(Di-tert-butylphosphino)biphenyl (CAS 224311-51-7)
PolyBlueChem supplies Tris(4-bromophenyl)phosphine (CAS 29949-81-3) at 97.0% purity, white powder, from gram to kilogram scale with per-batch COA and SDS. Send the quantity, the assay method and the purity profile your process needs, and we will confirm the grade and the documentation.
