Gamma-butyrolactone products is a hygroscopic colorless oily liquid with a weak characteristic odor and are soluble in water. GBL is a common solvent and reagent in chemistry and is used as an aroma compound, a stain remover, a superglue remover, a paint stripper, and a solvent in some wet aluminum electrolytic capacitors. In humans, it acts as a prodrug for GHB, and it is used as a recreational intoxicant with effects similar to alcohol.​
Gamma butyrolactone is a chemical. People use as medicine. Be careful not to confuse gamma-butyrolactone (GBL) with gamma-hydroxybutyrate (GHB). Despite serious safety concerns and illegality, people take gamma butyrolactone to improve athletic performance, sleep, and sexual performance, and pleasure.

Gamma butyrolactone GBL

Appearance & Taste:
At room temperature, GBL is a colorless, slightly oily liquid that is clear to semi-opaque. It has a distinctive taste that some users have described as being distinctly chemical, like a solvent, nail varnish, or paint stripper