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Product name gamma-butyrolactone
Synonyms 4-hydroxybutyric acid lactone
GOST no data
CAS 96-48-0

gamma-Butyrolactone (4-hydroxybutyric acid lactone; 4-butanolide; GBL) is clear colorless hygroscopic liquid. It is miscible with water, alcohols, acetone, ether, chloroform. It has low solubility in aliphatic hydrocarbons. gamma-Butyrolactone is slowly hydrolyzes in water to give gamma-hydroxybutyric acid (GHB). Being treated with oxidants butyrolactone forms succinic acid; interaction with CO in the presence of Ni or Co catalysts results in glutaric acid with high yield.


  • gamma-Butyrolactone is produced by dehydrogenation of 1,4-butylene glycol in liquid (catalyzed by Cu/SiO2; 200°C) or gaseous (catalyzed by - Cu/pumice; 230-250°C) phase;
  • by maleic anhydride dehydrogenation;


  • as an intermediate for the manufacture of butyric acid compounds and 2-pyrrolidones;
  • as a solvent for surface treatment for textiles and metal coated plastics, polymers (ABS, PVC, polyvinylcarbazole, PS, nylons and cellulose acetate );
  • as a paint remover;
  • in petroleum industry for natural gas, acetylene, paraffins, and naphthene separations;
  • as a viscosity modifier and curing agent for polyurethanes;
  • as an intermediate for vitamin and pharmaceutical manufacture;

  • Manufacturer(s) JSC Novocherkassk plant of synthetic products
    Chemical structure of gamma-butyrolactone

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