CAS #: 96-48-0

Synonyms: Dihydro-2(3H)-furanone; -butyrolactone; 4- hydroxybutyric acid, -lactone; y-butyrolactone; 4-butyrolactone

Uses: Intermediate for synthesis of butyric acid compounds, polyvinylpyrrolidone, methionine, solvent for acrylate and styrene polymers, ingredient of paint removers and textile assistants.

Hazard: Toxic by ingestion.  SYMPTOMS:  Symptoms of exposure to this compound may include irritation of the eyes, skin and mucous membranes.
ACUTE/CHRONIC HAZARDS:  This compound is an irritant to the skin and eyes.  When heated to decomposition it emits acrid smoke and irritating fumes.  4-BUTYROLACTONE can react with oxidizing materials, inorganic acids and bases, alcohols and amines.  Rapidly hydrolyzed by bases and slowly hydrolyzed by acids.  It is volatile with steam..  The combination of the lactone, butanol, 2,4-dichlorophenol, and sodium hydroxide in the attempted synthesis of 2,4-dichlorophenoxybutyric acid caused a thermal runaway reaction that eventually exploded.