D-Tagatose, identified by CAS 87-81-0, is a naturally occurring monosaccharide and a functional ketohexose that serves as a rare sugar isomer of D-galactose. It is typically found in small quantities in dairy products and is produced industrially through the enzymatic isomerization of galactose. As a white, odorless crystalline powder, it exhibits high solubility in water and remains stable under various processing conditions, making it a versatile ingredient in complex formulations.
In industrial and research contexts, D-Tagatose is valued for its unique thermodynamic properties and its role as a low-calorie sweetener. It provides approximately 90% of the sweetness of sucrose while contributing significantly fewer calories. Its chemical structure allows it to participate in Maillard reactions, which is beneficial for developing specific flavor profiles and browning characteristics in processed goods. Beyond its sweetening capabilities, it is studied for its potential as a prebiotic and its minimal impact on blood glucose levels.