1,1,2,2-Tetramethylethane 2,3-DIMETHYLBUTANE 2,3-Dimethylbutane [UN2457] [Flammable liquid] 79-29-8 Biisopropyl Butane, 2,3-dimethyl- CCRIS 6020 Diisopropyl EINECS 201-193-6 HSDB 76 NSC 24837 UN2457