Chem Products Description of Methyltriphenylphosphonium Bromide CAS#1779-49-3
Methyltriphenylphosphonium bromide is a solid quaternary phosphonium salt compound specially developed for flame retardant applications. Halogenated flame retardants have long been widely adopted organic flame retardant materials thanks to their superior flame‑retardant performance. Nevertheless, they tend to produce heavy smoke and toxic hydrogen halide gases during combustion, causing potential secondary hazards.
With the enforcement of EU RoHS and WEEE directives, the application of organic halogen‑containing flame retardants in electronic and electrical products has been increasingly restricted. Accordingly, the development of high‑efficiency halogen‑free flame retardants has become a key research and development focus in the flame retardant material industry.
Methyltriphenylphosphonium bromide Chemical Properties
| Melting point | 230-234 °C (lit.) |
| vapor pressure | 0.0000002 hPa |
| Fp | >240°C |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | H2O: 0.1 g/mL, clear |
| form | Powder |
| color | White |
| PH | 6.0-6.5 (400g/l, H2O, 20℃) |
| Water Solubility | 400 g/L (25 ºC) |
| Sensitive | Hygroscopic |
| BRN | 3599467 |
| InChIKey | LSEFCHWGJNHZNT-UHFFFAOYSA-M |
| LogP | -1.18 |
| CAS DataBase Reference | 1779-49-3(CAS DataBase Reference) |
| NIST Chemistry Reference | Methyltriphenylphosphonium bromide(1779-49-3) |
| EPA Substance Registry System | Phosphonium, methyltriphenyl-, bromide (1779-49-3) |
| Hazard Codes | Xn,Xi |
| Risk Statements | 20/21/22-36/37/38 |
| Safety Statements | 36/37-36-26 |
| RIDADR | UN 1390 4.3/PG 2 |
| WGK Germany | 3 |
| Autoignition Temperature | 410 °C |
| TSCA | T |
| HazardClass | 6.1 |
| PackingGroup | III |
| HS Code | 29310095 |
| Toxicity | LD50 orally in Rabbit: 118 mg/kg |
Product Application of Methyltriphenylphosphonium Bromide CAS#1779-49-3
Methyltriphenylphosphonium bromide can be used as a Wittig reagent for olefin synthesis and for extending the carbon chain of unsaturated compounds. As a ylide precursor in the Wittig reaction, it is widely applied in the formation of unsaturated bonds in liquid crystal materials.
Additionally, it is extensively utilized in organic synthesis and functions as an effective cationic phase transfer catalyst.
Company Profile
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