Description and features
Catonium BTPB (Butyltriphenylphosphonium Bromide) is a white to off-white powder, its chemical formula is C22H24BrP. BTPB is a quaternary phosphonium salt mainly used in organic synthesis as a wittig reagent and as a phase transfer catalyst in the production of fluoroelastomers, Epoxy Resins and Powder Coatings. This material is highly soluble in water and polarizable solvents.
Butyltriphenylphosphonium Bromide is also known as BTPB, BTPPB and TPBP-Br.
Compared to amines, imidazoles and quaternary ammonium salts CatOnium BTPB features considerable better latency and thermal stability. Further it offers a low odor, minimal color formation and controlled reactivity.
Availability
Europe and United States: Provided CatOnium BTPB is on stock in our local warehouses our lead time is about one week if delivered in 25 KG fiber drums.
Canada, South America, South Africa and other markets can also be served, please contact our sales department for more details.
This substance (CAS: 1779-51-7) has been registered under REACH (EC) 1907/2006.
Product Identification
| CAS number | 1779-51-7 |
| EC number | 918-205-7 |
| HS code | 2931 39 90 |
| Sensitivity | Hygroscopic |
Specification
| Appearance | White to off white powder |
| Assay | ≥98.00 % |
| Ash | ≤0.30 % |
| Loss on drying | ≤0.20 % |
| Triphenyl phosphine | ≤0.50 % |
Application
CatOnium BTPB (Butyltriphenylphosphonium Bromide) is being used in: (powder) coatings, (fluoro)elastomers and in epoxy resins.
Packaging
Available packaging: 21.95 / 25 KG/ 50 KG fiber drums.
Special packaging is available on request.
Storage
Store butyltriphenylphosphonium bromide in a cool, dry and well-ventilated area and in line with legal requirements.
Keep BTPB away from heat sources and oxidizing agents
MSDS
A Material Safety Data Sheets (MSDS) is available for CatOnium BTBP and all other products supplied by Vesta Chemicals BV.
An MSDS describes the hazards of a product and explains how a product can be safely handled, used and stored. Besides it provides important regulatory and emergency response information for the purchased product.
Molecular and structural information
| Molecular formula | C22H24BrP |
| Molecular weight | 399.30 g/mol |
| Smiles notation | Br.CCCCP(C1=CC=CC=C1)(C1=CC=CC=C1)C1=CC=CC=C1 |
| InChi key | IKWKJIWDLVYZIY-UHFFFAOYSA-M |
| Structural formula |  |
Physicochemical information
| Boiling point | No data available |
| Bulk density | No data available |
| Flash point | 255 ºC |
| Melting point | 240 – 243 ºC |
| Partition coefficient (log Pow) | 1.7846 |
| Solubility in water | Soluble |
| Vapor pressure | No data available |