5-Hydroxy-1-tetralone, is used as a metabolite of Levobunolol (L335000) and d-Bunolol (L335010). It is also used as a reagent for the determination of hexoses and oligosaccharides by a fluorescence technique. A reagent that is used for fluorescence determination of enzyme activity. Some of the other applications include as internal standard during HPLC determination of 4-hydroxymephenytoin (4-OH-M) in human urine, as fluorescent labeling reagent during micro detection of glycosphingolipid on TLC plates, in synthesis of 1,2,3,4-tetrahydro-5H-1-benzazepine-quinone derivatives, in synthesis of new chiral oxathiane.