| Formula | C4H8 |
| Molecular weight | 56.11 |
| Details: | but-1-ene |
| Total Number of Peaks | 25 |
| Record | Massbank Spectrum MSBNK-Fac_Eng_Univ_Tokyo-JP001574 |
| Link | 7844 |
| Base Peak | 41 |
| 2nd most intense Peak | 39 |
| 3rd most intense Peak | 56 |
| Formula | C4H8 |
| Molecular weight | 56.11 |
| Details: | but-1-ene |
| Total Number of Peaks | 21 |
| Record | Massbank Spectrum MSBNK-Fac_Eng_Univ_Tokyo-JP000318 |
| Link | 7844 |
| Base Peak | 41 |
| 2nd most intense Peak | 39 |
| 3rd most intense Peak | 28 |