L-Ascorbic acid powder CAS No.: 50-81-7 is a white or slightly yellow crystals or powder,a little acid.m.p.190°C-192°C,easily soluble in water,a little soluble in alcohol and uneasily soluble in Ether and chlorofom and other organic solvent.In solid state it is stable in air.Its water solution is easliy mutated when it meets with air. Ascorbic acid, or vitamin C, a water-soluble dietary supplement. Vitamin C is not only an important nutrient but is also used as an antioxidant in various foods. However, it is not soluble in fat and is unstable under basic conditions. The name ascorbic means antiscurvy and denotes the ability of ascorbic to combat this disease. Vitamin C can prevent scurvy, also known as "ascorbic acid." Over the years, animal experiments and clinical studies have found that vitamin C can lower blood cholesterol levels, enhance immunity, increase capillary elasticity, promote healing of wounds and surgical incisions, prevent colds, promote growth and development, and prevent chronic metal poisoning such as mercury and lead. To prevent aging, prevent tumors, etc. Therefore, in addition to treatment, there are many people who are consciously taking vitamin C, especially some middle-aged and older people prefer to take it regularly or for a long time.