CAS NO..90-80-2 D-(+)-Glucono-1,5-lactone

D-(+)-Glucono-1,5-lactone (CAS: 90-80-2, Synonyms: (Calbiochem;GluconoDeltaLactone,GluconoDeltaLactonepowder;CagliflozinImpurity8;delta-GluconolactoneinstockGMPFactory;1,2Chemicalbook,3,4,5-PENTAHYDROXYCAPROICACIDDELTA-LACTONE;DELTA-GLUCURONOLACTONE;D(+)-DEXTRONICACIDDELTA-LACTONE;D-GLUCONICACIDLACTONE) is an ester formed by the dehydration between the carboxyl group of gluconic acid and the hydroxyl group within the molecule. Specifically, the ester formed by dehydration with the hydroxyl group on the 5th (δ-position) carbon atom is called glucono-δ-lactone; the ester formed by dehydration with the hydroxyl group on the 4th (γ-position) carbon atom is called glucono-γ-lactone. It appears as crystals with a sweetness different from gluconic acid. It decomposes at 153°C, with a specific rotation [α]D20 of +61.7° (C=1). It is highly soluble in water, where it hydrolyzes to form gluconic acid, establishing an equilibrium mixture with both δ- and γ-lactones. Structurally, gluconolactone and its phosphate esters are intermediates in the oxidative breakdown of glucose (the pentose phosphate pathway) in living organisms. In food processing, it serves as a coagulant for soybean or milk proteins, a preservative for meat, a leavening agent for pastries, and a stabilizer for pigments.