Gamma-butyrolactone (GBL) is a colorless, odorless liquid that is commonly used as a solvent in various industrial applications. It is a cyclic ester, which means it has a ring structure that allows it to easily dissolve many organic compounds. GBL is often found in products like paint removers, adhesives, and cleaning agents. In addition to its industrial uses, GBL is also a precursor to gamma-hydroxybutyrate (GHB), a substance that has both medical and recreational applications. While GBL can be used safely in controlled environments, it is important to handle it with care due to its potential for misuse and associated health risks.