| Name | 1-Butanesulfonic acid, 4-hydroxy-, methyl ester |
| Synonyms | 1-Butanesulfonic acid, 4-hydroxy-, methyl ester Busulfan Impurity 18 Voriconazole Impurity 60 |
| CAS | 343928-18-7 |
| Molecular Formula | C5H12O4S |
| Molar Mass | 168.21 |
| Density | 1.237±0.06 g/cm3(Predicted) |
| Boling Point | 326.5±25.0 °C(Predicted) |
| pKa | 14.96±0.10(Predicted) |