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Order (GBL) online (GBL) is a colorless hygroscopic water-mixable fluid of low odour. It is 4-carbon lactone the simplest. In humans, GBL acts like a prodrug for α-hydroxybutyric acid () and as a recreational CNS depressant with effects How is GBL made?Extracts of GBL from unadulterated wine samples were found. This finding shows that in some wines GBL is naturally present and can be found in similar products. The detection concentration was about 5 μg/mL and was easily followed by a GC/MS analysis with a simple removal technique. In cheese-flavors, GBL can be found, but in general, the final food is 0.0002% GBL. GBL.Delhydrogenation of 1,4- butane diol at 180-300 ° C, atmospheric pressure in the presence of copper catalyst, produces α-Butyrolactone industrially.

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