| Molecular Formula | C4H5NO |
| Molar Mass | 83.09 |
| Density | 0.99g/mLat 25°C(lit.) |
| Melting Point | 76°C |
| Boling Point | 189°C |
| Flash Point | 169°F |
| Vapor Presure | 1.01mmHg at 25°C |
| Storage Condition | 2-8℃ |
| Refractive Index | n20/D 1.455(lit.) |
| MDL | MFCD00044798 |
| Hazard Symbols | Xn - Harmful![]() |
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37 - Wear suitable protective clothing and gloves. S7/9 - |
| UN IDs | UN 3334 |
| WGK Germany | 3 |
| Use | synthesis of cefoselis intermediate |