Sukrosa

Sukrosa, commonly called sucrose, is a disaccharide that serves as a widespread dietary sweetener. Its chemical composition is glucose linked to fructose through a glycosidic bond, specifically alpha-D-glucopyranosyl-(1→2)-beta-D-fructofuranoside. Because the glycosidic linkage involves the anomeric carbon of both monosaccharide units, sucrose is considered a non-reducing sugar.

Natural occurrence and production: Sukrose occurs naturally in many plants, but the major commercial sources are sugarcane (Saccharum officinarum) and sugar beet (Beta vulgaris). Industrial production involves extracting juice from the plant material, clarifying it to remove impurities, concentrating it by evaporation, and crystallizing sugar to form granules and other forms.

Physical and chemical properties: Molecular formula C12H22O11; molar mass 342.30 g/mol. It is highly soluble in water and stable under ordinary storage conditions. It is a non-reducing sugar due to its glycosidic linkage. In solution it can form invert sugar under hydrolysis, yielding glucose and fructose.

Biological role: In humans, sucrase in the small intestine hydrolyzes sucrose into glucose and fructose, which are absorbed and used for energy and metabolic processes. Sucrose is metabolically processed similarly to other dietary carbohydrates but has a relatively high sweetness.

Uses and applications: Sucrose is the standard sweetener in foods and beverages and is used in baking, confectionery, and preserved products. It can participate in caramelization and browning reactions; inverted sugar, produced by hydrolysis, is used in some recipes for moisture retention and texture.

Health and safety: For most people, sucrose is safe in moderate amounts, but excessive intake is linked to dental caries, obesity, and metabolic disorders. Dietary guidelines generally advise limiting added sugars, including sucrose.