| Name | 2-BUTENE |
| Synonyms | 2-Buten 2-BUTENE (2E)-2-Butene TRANS-2-BUTENE TRANS-BUTENE-2 TRANS-B-BUTYLENE dimethylethylene TRANS-PSEUDOBUTYLENE TRANS-SYM-DIMETHYLETHYLENE |
| CAS | 107-01-7 |
| EINECS | 203-452-9 |
| Molecular Formula | C4H8 |
| Molar Mass | 56.11 |
| Density | 0.6210 |
| Melting Point | −140 °C(lit.) |
| Boling Point | 1 °C(lit.) |
| Flash Point | <−30 °F |
| Vapor Presure | 2575 mm Hg ( 37.7 °C) |
| Refractive Index | 1.3853 (estimate) |
| Use | Mainly used for dehydrogenation to butadiene, can also be hydrated to produce SEC-butanol |
| Risk Codes | 12 - Extremely Flammable |
| Safety Description | S9 - Keep container in a well-ventilated place. S16 - Keep away from sources of ignition. S33 - Take precautionary measures against static discharges. |
| UN IDs | UN 1012 2.1 |
| vapor density | 2 (vs air) |
| explosion limit value (explosive limit) | 9.3% |
| Merck | 1520 |
| BRN | 1718755 |
| EPA chemical information | 2-Butene (107-01-7) |
| category | harmful gases |
| toxicity classification | Poisoning |
| acute toxicity | inhalation-mouse LC50: 425 ppm |
| flammability hazard characteristics | When heated, open flames and oxidants are flammable; thermal decomposition discharges spicy and irritating smoke |
| WGK Germany | 3 |
| RTECS number | EM2932000 |
| Hazard Note | Flammable |
| HazardClass | 2.1 |
| customs code | 29012320 |
| toxic substance data | 107-01-7(Hazardous Substances Data) |