Triphenylphosphine CAS#603-35-0
High Solubility in Organic Solvents ： Easily soluble in ether, soluble in benzene, chloroform, and glacial acetic acid, facilitating its application in diverse chemical processes.
Stable Physical Properties ： Exhibits a high boiling point (>360°C under inert gas) and a defined melting range (78.5–81.5°C), ensuring robustness under high-temperature conditions.
Versatile Ligand Role in Catalysis ： Serves as a critical ligand for homogeneous catalysts, widely utilized in petrochemical and fine chemical production, driving efficiency in reactions.
Growing Demand and Emerging Applications ： Shows increasing annual demand due to continuous development of new uses, highlighting its expanding relevance in industrial chemistry.
Products Description of Triphenylphosphine CAS#603-35-0
Triphenylphosphine has the molecular formula C₁₈H₁₅P and a molecular weight of 262.30. It appears as a white to off-white crystalline powder. The product is readily soluble in ether, soluble in benzene, chloroform, and glacial acetic acid, slightly soluble in ethanol, and nearly insoluble in water. Its melting point ranges from 78.5 to 81.5 °C, while its boiling point exceeds 360 °C under an inert atmosphere. Triphenylphosphine is an important ligand for homogeneous catalysts in petrochemical and fine chemical manufacturing, with continuously expanding applications and steadily growing market demand.
Parameters
| Melting point | 79-81 °C(lit.) |
| Boiling point | 377 °C(lit.) |
| bulk density | 500-600kg/m3 |
| density | 1.132 |
| vapor density | 9 (vs air) |
| vapor pressure | 5 mm Hg ( 20 °C) |
| refractive index | 1.6358 |
| Fp | 181 °C |
| storage temp. | Store below +30°C. |
| solubility | water: soluble0.00017 g/L at 22°C |
| form | Crystals, Crystalline Powder or Flakes |
| color | White |
| Specific Gravity | 1.132 |
| Odor | odorless |
| Water Solubility | Insoluble |
| Hydrolytic Sensitivity | 8: reacts rapidly with moisture, water, protic solvents |
| Merck | 149,743 |
| BRN | 610776 |
| Stability: | Stable. Incompatible with oxidizing agents, acids. |
| InChIKey | RIOQSEWOXXDEQQ-UHFFFAOYSA-N |
| CAS DataBase Reference | 603-35-0(CAS DataBase Reference) |
| NIST Chemistry Reference | Phosphine, triphenyl-(603-35-0) |
| EPA Substance Registry System | Triphenylphosphine (603-35-0) |
Safety Information
| Hazard Codes | Xn,N |
| Risk Statements | 22-43-53-50/53-48/20/22 |
| Safety Statements | 36/37-60-61-36/37/39-26 |
| RIDADR | 3077 |
| WGK Germany | 2 |
| RTECS | SZ3500000 |
| F | 9 |
| Autoignition Temperature | 425 °C |
| TSCA | Yes |
| HS Code | 29310095 |
| Hazardous Substances Data | 603-35-0(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 700 mg/kg LD50 dermal Rabbit > 4000 mg/kg |
Product Application of Triphenylphosphine CAS#603-35-0
Triphenylphosphine can be initially sulfonated with oleum to produce the corresponding trisulfonic acid. It is widely applied in Wittig reactions and serves as a standard ligand in homogeneous catalytic systems.
It is also used for the preparation of organophosphorus intermediates, such as trimethyl phosphite via transesterification, which can subsequently be converted into various organophosphorus pesticides including dichlorvos, monocrotophos, and phosphamidon.
Additionally, triphenylphosphine functions as a stabilizer in rubber and resin production, an antioxidant in polyvinyl chloride formulations, and a raw material for the synthesis of alkyd and polyester resins.
