Definition of butanediol
: any of four isomeric glycols C4H8(OH)2: such as a : a hygroscopic liquid CH3CHOHCH2CH2OH made usually by hydrogenation of aldol and used chiefly as a humectant and plasticizer —called also 1,3-butanediol, 1,3-butylene glycol b : a viscous liquid CH2OHCH2CH2CH2OH made from acetylene, formaldehyde, and hydrogen and used chiefly in making polyurethane resins —called also 1,4-butanediol, 1,4-butylene glycol, tetramethylene glycol c : a hygroscopic viscous liquid or crystalline solid CH3CHOHCHOHCH3 known in four optically different forms, obtained usually by fermentation (as of grains or molasses), and used chiefly in organic synthesis —called also 2,3-butanediol, 2,3-butylene glycol
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Origin and Etymology of butanediol
butane + -diol
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