D-Isoascorbic acid

CAS NO.:89-65-6     

MF: C7H10O6 

MW: 176.12    

Nature:White to light yellow crystal or crystalline powder. Odorless, sour taste. The light gradually darkened. In the dry state, it is quite stable in the air. But it deteriorates rapidly in solution and in the presence of air. It melts and decomposes at 164 ~ 172℃. This strain is an isomer of ascorbic acid, chemically similar to ascorbic acid, but has little physiological activity of ascorbic acid (only about 1

20). The oxidation resistance is better than ascorbic acid, the price is also cheaper, but the heat resistance is poor. It has strong reducibility, slowly coloring and decomposition when exposed to light. Heavy metal ions promote its decomposition. Highly soluble in water (40g

100m1). Soluble in ethanol (5g

100ml). Insoluble in glycerol. Insoluble in ether and benzene.       

Application: Isoascorbic acid is one of the most important isomers of vitamin C. Its physiological effect is only 1

20 of ascorbic acid in ascorbic acid, but its effect in lowering blood pressure, diuresis, liver glycogen generation, pigment excretion, detoxification and other aspects is roughly the same as that of ascorbic acid. Therefore, the market demand for isoascorbic acid is competitive with vitamin C. Isoascorbic acid is mainly used in the food industry. It accounts for more than 93% of the total demand in Japan. Used as food antioxidant, widely used in meat food, fish food, beer, fruit juice, fruit juice crystal, canned fruit and vegetables, pastry, dairy products, jam, wine, pickles, fats and so on. Toxicity of isoascorbic acid: The oral LD50 of mice is 5g

kg. The rats were fed a diet containing 1% isascorbic acid for 6 months, and no abnormal growth was observed. There were no abnormalities in weight, mortality and histopathology observed after two years of feeding. People ingest isoascorbic acid, which can be converted into vitamin C in the body.