Diethylene glycol butyl ether (DEGBE, 2-(2-butoxyethoxy)ethanol, DEG monobutyl ether) is the organic compound with the formula C4H9OC2H4OC2H4OH. A colorless liquid, it is common industrial solvent. It is one of several glycol ether solvents. It has low odour and high boiling point. It is mainly used as a solvent for paints and varnishes in the chemical industry, household detergents, and textile processing.
Production and use Diethylene glycol monobutyl ether is produced from butanol by ethoxylation, the reaction with ethylene oxide in the presence of a basic catalyst.
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