VC/L(+)-Ascorbic acid

CAS No.: 50-81-7

C6H8O6=176.12

Grade: ar

Content: ≥ 99.0%

Specific rotation: +20.5 ~ 21.5 °

Melting point: 190 ~ 192 ℃

Identification: qualified

Resolution clarity: ≤ 0.5

Heavy metals: ≤ 0.001%

Ignition residue: ≤ 0.1%

Copper: ≤ 0.0005%

Iron: ≤ 0.0002%

Extinction value of solution (420mm): ≤ 0.03

Physicochemical Properties: white crystal, odorless, citric acid like sour taste. It is stable in dry air, impure and many natural products can be oxidized by air and light, and its aqueous solution will soon be oxidized to dehydroascorbic acid. Alkali, iron and copper can accelerate the reaction. It can form a stable metal salt, which is a relatively strong reductant. After storage for a long time, the color becomes darker and becomes light yellow to varying degrees. 1g soluble in about 3ml water, 30ml ethanol, 50ml absolute ethanol

Purpose: biochemical research. A reference reagent for the determination of arsenic, iron, phosphorus and iodine. Chromatographic reagent. Food antioxidant. Masking agent. Reductant. Determine bismuth, calcium, magnesium, titanium, molybdenum, tungsten and antimony. Adrenaline determination

Storage: RT, avoid light and contact with metal