The molecular formula C4H9I, (molar mass: 184.020 g/mol, exact mass: 183.97490 u) may refer to:
- 1-Iodobutane
- 2-Iodobutane
- tert-Butyl iodide
- 1-Iodo-2-methylpropane
The molecular formula C4H9I, (molar mass: 184.020 g/mol, exact mass: 183.97490 u) may refer to: