Categories Articles 1,2-Butanolide Post author By forendex.southernforensic CSA Names: 1,2-Butanolide 1,4-Butanolide Dihydro-2(3H)-furanone Gamma-butyrolactone Gamma-hydroxybutyric acid lactone GBL 4-Hydroxybutanoic acid lactone CSA Location: Listed Chemicals Section (a) Subsection (24) DEA code 2011 CSA History: 65 FR 21645 added effective 24 Apr 2000 Names: Dihydrofuran-2(3H)-one (IUPAC) Molecular formula: C4H6O2 Nominal mass: 86 Average mass: 86.0892 Monoisotopic mass: 86.036779 CAS registry number: 96-48-0 ChemSpider: 7029 PubChem: 7302 Wikipedia: gamma-Butyrolactone Erowid: Drugs-Forum: GBL Bluelight: Standard InChI: InChI=1S/C4H6O2/c5-4-2-1-3-6-4/h1-3H2 Standard InChI key: YEJRWHAVMIAJKC-UHFFFAOYSA-N SMILES: O=C1CCCO1 Tags: USCSA,unclassified ← Dioxaphetyl butyrate → /N-Phenyl-/N-[1-(2-thienyl)ethyl-4-piperidinyl]propanamide