Chemical Properties
| Melting point | -32 °C |
| Boiling point | 27 °C(lit.) |
| Density | 0.691 g/mL at 25 °C(lit.) |
| vapor pressure | 11.47 psi ( 20 °C) |
| refractive index | n |
| Flash point | -25 °C |
| storage temp. | 2-8°C |
| form | Liquid |
| Specific Gravity | 0.691 |
| color | Clear colorless to light yellow |
| Water Solubility | Not miscible in water. |
| Thermal Conductivity | 0.12 W/(m·K) at 25 ℃ |
| BRN | 1361340 |
| Henry's Law Constant | 4.6×10-4 mol/(m3Pa) at 25℃, Yaws (2003) |
| InChI | InChI=1S/C4H6/c1-3-4-2/h1-2H3 |
| InChIKey | XNMQEEKYCVKGBD-UHFFFAOYSA-N |
| SMILES | CC#CC |
| CAS DataBase Reference | 503-17-3(CAS DataBase Reference) |
Safety Information
| Hazard Codes | F+,Xi |
| Risk Statements | 12-36/37/38 |
| Safety Statements | 16-26-36 |
| RIDADR | UN 1144 |
| WGK Germany | 3 |
| RTECS | GQ7210000 |
| TSCA | TSCA listed |
| HazardClass | 3 |
| PackingGroup | I |
| HS Code | 29012990 |
| Storage Class | 3 - Flammable liquids |
| Hazard Classifications | Eye Irrit. 2 Flam. Liq. 1 Skin Irrit. 2 STOT SE 3 |