| Melting point | -14.5 °C |
| Boiling point | 280 °C(lit.) |
| density | 1.07 g/mL at 25 °C(lit.) |
| vapor pressure | 2 mm Hg ( 110 °C) |
| refractive index | n |
| Fp | -18°C (Hexane) |
| storage temp. | 2-8°C |
| solubility | Chloroform |
| pka | diphenylphosphine is weakly basic. The pKa of the protonated derivative is 0.03. |
| form | liquid |
| color | colorless |
| Specific Gravity | 0.68 |
| Water Solubility | Miscible with ethanol, ether, benzene, concentrated hydrochloric acid. Immiscible with water. |
| Sensitive | Air & Moisture Sensitive |
| Hydrolytic Sensitivity | 8: reacts rapidly with moisture, water, protic solvents |
| BRN | 742504 |
| InChIKey | GPAYUJZHTULNBE-UHFFFAOYSA-N |
| CAS DataBase Reference | 829-85-6(CAS DataBase Reference) |
| NIST Chemistry Reference | Phosphine, diphenyl-(829-85-6) |
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