Ascorbic acid 50-81-7

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Ascorbic acid  

Molecular formula:   C₆H₈O₆

Molecular weight:    176.14

DESCRIPTION:

White to light yellow crystal or crystalline powder. Odorless. Exists sourness. Flash point 99 . Melting point 187 ~ 192 . By the illumination was gradually browning, dry state fairly stable in the air, but in the presence of air is rapid deterioration in solution, PH value of 3.4 ~ 4.5 more stable. This product is about 1g soluble in 5ml water and 30ml ethanol.

0.5% aqueous solution PH value of 3,5% aqueous solution PH value of 2. Not soluble in chloroform, ethyl ether, non-volatile oil and benzene. Showed a strong reduction, there has been inhibiting polyphenol oxidase effect, it is added to beer, fruit juice and other foods can be used as antioxidants.

This product is widely distributed in plant tissues, fresh fruits and vegetables are more content. Especially parsley, roxburghrose, kiwi fruit, peppers, tomatoes, citrus for more.

PREPARATION: Reichstein commonly used as method, using glucose as raw material, pressure in the nickel-catalyzed hydrogenation of a mountain sorbitol, and then by acelobacter suboxydans fermented L-sorbose, in concentrated sulfuric acid catalyzed reaction with acetone Diacetone-L - sorbitol, and then in alkaline conditions, using potassium permanganate oxidation of the cost of goods.

QUALITY STANDARD

GB14754-93

FAO/WHO 1992

APPLICATION:

Nutritional supplements; anti-oxidants; protecting reagent. Control scurvy, alveolar pyorrhea, anemia, loss of appetite and so on. Can enhance resistance to infectious diseases. In addition, the still shown in the following aspects.

 (1)Vitamine C and the Brain    

Through experiments, found that people's IQ with the blood concentration of vitamin C increased rise. Infants lack of vitamin C, can lead to brain dysfunction. Neurons in the brain tissue there is a very small neural tube, and its role is to transport essential nutrients the brain, but it is easy to plug and deformation, while the vitamin C, you can change this situation, the full complement of vitamin C can improve the permeability channels to promote brain activity and timely and smooth access to the necessary nutrients, thereby improving brain function, so that intelligence to improve.

 (2)Vitamine C and Immunity    

Vitamin C can promote the secretion of prostatic fluid and lymph, so that the body produces interferon and anti-toxins, which play a role in immune and anti-virus. A lack of vitamin C, the body's immune function decline, the decline in control of foreign tissue, especially the T lymphocytes. Prostaglandin B4 is capable of regulating the role of T lymphocytes, and its synthesis of vitamin C