Sucrose is a disaccharide, which is formed by condensation and dehydration of hemiacetal hydroxyl groups of glucose and fructose. Its molecular formula is C 12H22O 1 1. Sucrose is an organic compound with a molecular weight of 342.3, colorless crystal, and optical rotation, but no optical rotation.

Properties of sucrose

1, thermal decomposition.

The crystallized sucrose is heated to 65438 060℃, melted into a viscous and transparent liquid, and recrystallized after cooling.

2. The role of acid.

When the sucrose solution is acidic, the sucrose conversion is faster.

3, the role of alkali.

Dilute alkali solutions, such as calcium hydroxide, potassium hydroxide and sodium solution, will not decompose sucrose even if boiled.

4. The role of salt.

When sucrose and salt coexist in water, their solubility will change.

5. oxidation.

The combustion or biological oxidation of sucrose produces carbon dioxide and water. Potassium permanganate can oxidize sucrose into carbon dioxide, formic acid, acetic acid and oxalic acid in neutral or acidic solution, but it can only be partially oxidized into oxalic acid and carbon dioxide under alkaline conditions.

6, the role of microorganisms on sucrose.

The dilute solution of sucrose is susceptible to microbial infection.