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Main components of edible white sugar and rock sugar
The main component of rock sugar using white sugar is sucrose.

Sucrose (C 12H22O 1 1) is a non-reducing disaccharide formed by dehydration and condensation of glucose and fructose.

Sucrose is easily soluble in water, and its solubility increases with the increase of temperature. Sucrose is also soluble in aniline, nitrobenzene, ethyl acetate, amyl acetate, molten phenol, liquid ammonia, the mixture of alcohol and water, and the mixture of acetone and water, but insoluble in organic solvents such as gasoline, petroleum, anhydrous ethanol, chloroform, carbon tetrachloride, carbon disulfide and turpentine. Sucrose is a crystalline substance. The specific gravity of pure sucrose crystal is 1.5879, and the specific gravity of sucrose solution varies with concentration and temperature.