106-97-8 A 21 A 21 (lowing agent) BUTANE Butane [USAN] Butane or butane mixtures [UN1011] [Flammable gas] Butane, pure Butanen [Dutch] Butani [Italian] Butyl hydride CCRIS 2279 Diethyl EINECS 203-448-7 HC 600 HC 600 (hydrocarbon) HSDB 944 LPG Liquefied petroleum gas Methylethylmethane R 600 R 600 (alkane) UN1011 n-Butane