1-Methoxybutane 628-28-4 BUTYL METHYL ETHER Butane, 1-methoxy- (9CI) Butyl methyl ether [UN2350] [Flammable liquid] EINECS 211-033-7 Ether, butyl methyl Methyl butyl ether Methyl n-butyl ether UN2350 alpha-Methoxybutane