White crystal or crystalline powder food grade vitamin c powder
US$200
- US$5000
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25kg
1000kg
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Vitamin C, also known as vitamin C, is a polyhydroxy compound with the chemical formula C6H8O6. The structure is similar to glucose, and the two adjacent enol hydroxyl groups on the 2nd and 3rd positions in the molecule are easily dissociated to release H+, so it has the property of acid, also known as L-ascorbic acid. Vitamin C has strong reducibility and is easily oxidized to dehydrovitamin C, but its reaction is reversible, and ascorbic acid and dehydroascorbic acid have the same physiological function, but if dehydroascorbic acid is further hydrolyzed, it will generate dike tone ancient. Laconic acid, the reaction is irreversible, and the physiological efficacy is completely lost.
The molecular structure of vitamin C has an enediol structure, a lactose ring, and 2 chiral carbon atoms. Therefore, vitamin C is not only active, but also has optical activity.
Application
Related Product
Vitamin C, also known as vitamin C, is a polyhydroxy compound with the chemical formula C6H8O6. The structure is similar to glucose, and the two adjacent enol hydroxyl groups on the 2nd and 3rd positions in the molecule are easily dissociated to release H+, so it has the property of acid, also known as L-ascorbic acid. Vitamin C has strong reducibility and is easily oxidized to dehydrovitamin C, but its reaction is reversible, and ascorbic acid and dehydroascorbic acid have the same physiological function, but if dehydroascorbic acid is further hydrolyzed, it will generate dike tone ancient. Laconic acid, the reaction is irreversible, and the physiological efficacy is completely lost.
The molecular structure of vitamin C has an enediol structure, a lactose ring, and 2 chiral carbon atoms. Therefore, vitamin C is not only active, but also has optical activity.
Application
Traits
Vitamin C is a white crystal or crystalline powder, odorless, sour, and gradually turns yellowish after a long time. Soluble in water, acidic, slightly soluble in ethanol, insoluble in chloroform or ether.
Acidic
The molecular structure of vitamin C has an enediol structure. Due to the influence of conjugation, C2-OH is very weak in acidity (pK2=11.57), and C3-OH is more acidic (pK1=4.17), so vitamins generally behave as monoacids , can act as a sodium salt with sodium bicarbonate.
Optical rotation
The molecular structure of vitamin C contains 2 chiral carbon atoms, so it has optical activity. According to the law (ChP2015 general rule 0621), the specific rotation of the aqueous solution containing 0.10g/mL of this product is +20.50°~+21.50°.
Reducibility
The enediol group in the molecular structure has a strong reducibility and is easily oxidized into a diketone group to become dehydroascorbic acid. Dehydroascorbic acid can be further hydrolyzed in alkaline solution or strong acid solution to form diketogulonic acid. and lose activity.
Hydrolyzability
The action of vitamin C and sodium carbonate can generate monosodium salt without hydrolysis, and the lactone ring becomes stable due to the double bond, but in strong alkaline solution, the lactone ring can be hydrolyzed to generate keto acid salt.
Properties of sugars
The structure of vitamin C is similar to that of sugar, so it has a carbohydrate-like reaction.
UV ray absorbtion
There is a conjugated double bond in the vitamin C molecule, and its dilute hydrochloric acid solution has a maximum absorption at 243nm, and if it is under neutral or alkaline conditions, the red shift to 265nm.
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