3d image of isobutane skeletal formula

isobutane -butane methylpropane isomer structure structural formula butane molecule expanded condensed chemical perspective c4h10 ionization molecular branched chain conformation density harmful skin liwuid hydrocarbon alkane petrochemical industry isooctane precursor solvent propellant refrigerant e943b 3d chemistry organic compound reagent iupac dangerously flammable bleve dangerous fire petrol component octane number