Description and features
CatOnium MTPB (Methyltriphenylphosphonium Bromide) appears as a white powder with the chemical formula C19H18BrP. Mainly used in organic synthesis, MTPB acts as a Wittig reagent and a phase transfer catalyst in producing powder coatings. Additionally, this material is highly soluble in water and polarizable solvents. Known as MTPB, Triphenyl phosphate bromide, and triphenylmethylphosphonium, Methyltriphenylphosphonium Bromide offers significant advantages.
Compared to amines, imidazoles, and quaternary ammonium salts, CatOnium MTPB provides much better latency and thermal stability. Furthermore, it boasts low odor, minimal color formation, and controlled reactivity.
Availability
Europe and United States: Provided CatOnium MTPB is in stock in our local warehouses our lead time is about one week if delivered in 20 KG drums.
We can also serve Canada, South America, South Africa, and other markets. Please contact our sales department for more details.
➔ Limited availability in the European Union as this product has not been REACH registered (yet).
Product Identification
| CAS number | 1779-49-3 |
| EC number | 217-218-9 |
| HS code | 2931 39 00 |
| Sensitivity | Hygroscopic |
Specification
| Appearance | White crystal powder |
| Assay | ≥ 98.00 % |
| Ash | ≤ 0.30 % |
| Loss on drying | ≤ 0.20 % |
| Triphenyl phosphine | ≤ 0.50 % |
Application
CatOnium MTPB (Methyltriphenylphosphonium Bromide) is being used in: (powder) coatings.
Packaging
Available packaging: 20 KG / 25 KG fiber drums.
Special packaging is available on request.
Storage
Store Methyltriphenylphosphonium bromide in a cool, dry, and well-ventilated area, while ensuring compliance with legal requirements. Furthermore, keep MTPB away from heat sources and oxidizing agents to maintain safety and prevent potential hazards.
MSDS
A Material Safety Data Sheet (MSDS) is available for CatOnium BTBP and all other products supplied by Vesta Chemicals BV.
An MSDS outlines the hazards of a product and explains how to handle, use, and store the product safely. Besides it provides important regulatory and emergency response information for the purchased product.
Molecular and structural information
| Molecular formula | C19H18BrP |
| Molecular weight | 357.22 g/mol |
| Smiles notation | [Br-].C[P+](c1ccccc1)(c2ccccc2)c3ccccc3 |
| InChi Key | BKRKYEFQSANYGA-UHFFFAOYSA-N |
| Chemical formula |  |
Physicochemical information
| Bulk density | 285 – 320 KG/m3 |
| Flash point | >240 ºC |
| Melting point | 230 – 234 °C |
| Log Kow | -0.58 |
| Solubility in water | 342 g/l @ 20 ºC |
| Vapor pressure | 0.0000002 hPa |