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CAS: 57-88-5 
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1.       CAS NO.: 57-88-5

2.       Cholesterol is a derivative of cyclopentane. Cholesterol is widely found in animals, especially in brain and nerve tissue. It is also high in kidney, spleen, skin, liver and bile. Its solubility is similar to fat, insoluble in water, easily soluble in ether, chloroform and other solvents. Cholesterol is an important and indispensable substance in animal tissues and cells. It not only participates in the formation of cell membrane, but also is the raw material for the synthesis of bile acids, vitamin D and steroids.

Cholesterol is divided into high-density cholesterol and low-density cholesterol. The former has a protective effect on cardiovascular system, which is usually called "good cholesterol". The latter is higher, which will increase the risk of coronary heart disease, which is usually called "bad cholesterol". The content of cholesterol in blood is 140-199 mg per unit, which is a relatively normal cholesterol level.

Cholesterol is made up of a steroid part and a long side chain. The total amount of cholesterol in the human body accounts for about 0.2% of the body weight. Bone contains about 10 mg, skeletal muscle contains about 100 mg, viscera contain 150-250 mg, liver and skin contain about 300 mg. The highest content was found in brain and nerve tissue, about 2G per 100g tissue, which accounted for 1 / 4 of the total body.

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