Chemical Properties
| Melting point | -109 °C (lit.) |
| Boiling point | 56-57 °C (lit.) |
| Density | 0.71 g/mL at 25 °C (lit.) |
| vapor pressure | 393 mm Hg ( 37.7 °C) |
| refractive index | n |
| Flash point | −23 °F |
| storage temp. | Flammables area |
| solubility | soluble in Ether,Alcohol,Benzene |
| form | Liquid |
| Specific Gravity | 0.711 |
| color | Clear colorless to slightly yellow |
| explosive limit | 1.2-8.8%(V) |
| BRN | 1696938 |
| Henry's Law Constant | 5.6×10-4 mol/(m3Pa) at 25℃, Yaws (2003) |
| InChI | 1S/C5H8/c1-3-5-4-2/h3H2,1-2H3 |
| InChIKey | NKTDTMONXHODTI-UHFFFAOYSA-N |
| SMILES | CCC#CC |
| CAS DataBase Reference | 627-21-4(CAS DataBase Reference) |
Safety Information
| Hazard Codes | F,Xi |
| Risk Statements | 11-36/37/38 |
| Safety Statements | 16-26-36/37/39 |
| RIDADR | UN 3295 3/PG 2 |
| WGK Germany | 3 |
| F | 10-23 |
| HazardClass | 3 |
| PackingGroup | II |
| HS Code | 29012900 |
| Storage Class | 3 - Flammable liquids |
| Hazard Classifications | Eye Irrit. 2 Flam. Liq. 2 Skin Irrit. 2 STOT SE 3 |