Isobutane (CAS 75-28-5) Market Research Report 2026 '@aboutIsobutane (propane, 2-methyl-; Trimethylmethane; 1,1-Dimethylethane; 2-Methylpropane; iso-C4H10; i-Butane; UN 1969; etc.) refers to the simplest alkane with a tertiary carbon. The molecular formula of isobutene is C4H10. Isobutane is a colorless ...