| Property | Specification |
| Appearance | Clear, colorless to pale yellow liquid |
| Odor | Characteristic, aromatic odor |
| Molecular Formula | C9H6N2O2 |
| Molecular Weight | 174.16 g/mol |
| Density | 1.22–1.23 g/cm³ (at 25°C) |
| Boiling Point | 251°C (484°F) |
| Melting Point | -22°C (-7.6°F) |
| Solubility | Insoluble in water, soluble in organic solvents (e.g., benzene, toluene) |
| Viscosity | 23–35 mPa·s (at 25°C) |
| Refractive Index | 1.568 (at 25°C) |
| Vapor Pressure | 0.03 mmHg (at 20°C) |
