Gamma-butyrolactone (GBL) is a chemical compound that is commonly used as an industrial solvent and cleaning agent. It is a colourless liquid with a slightly sweet odour. GBL is known for its ability to dissolve a wide range of substances, making it useful in various industries such as pharmaceuticals, electronics, and automotive.
While GBL has legitimate industrial uses, it is also sought after for its potential recreational use. When ingested, GBL is converted into GHB in the body.