GBL (also known as gamma bytirolactone) has been found as extracts from samples of unadulterated wines. This indicates that gamma bytirolactone is a natural component and can be found in other products without sintezing (you can buy GBL in our online shop).
The concentration was detected in a 5 microgram/mL and was easily observed using a simple extraction technique followed by GC / MS analysis. Also GBL can be found in cheese flavorings but in the final foodstuff.
Nowadays GBL is made of 1,4-butanediol with reaction of dehydrogenation. This method allows to get GBL purity up to 99.99% and use product in chemistry and as a strong solvent or stains remover.
As a lactone, GBL is hydrolyzed under basic conditions, for example in a sodium hydroxide solution in sodium-gamma-hydroxybutyrate, the sodium salt of gamma-hydroxybutyric acid. In acidic water, a mixture of the lactone and acid forms coexist in an equilibrium. These compounds then may go on to form the polymer poly (4-hydroxybutyrate). When treated with a non-nucleophilic base, such as lithium diisopropylamide, GBL undergoes deprotonation alpha to the carbonyl. The related compound caprolactone can be used to make a polyester in this manner.
However, GBL cleaner (solvent) cant be used for ingestion and due to its chemical activity, working with it is allowed only in goggles and gloves.