Vitamin A acetate powder
Vitamin A acetate powder
Vitamin A is not a single compound, but a derivative of retinoids including retinol, retinene, retinoic acid, retinyl acetate, retinyl palmitate. The specifications commonly used in food and nutrients are retinyl acetate,and retinyl palmitate, because both specifications of vitamin A are the most stable.
Vitamin A is all compounds that have the bioactivity of retinol. There are two major classes of substances that can provide retinol bioactivity. One refers to retinoids, their metabolites, and synthetic analogues with similar structures, also known as retiniods substances, also known as the preformed major dietary sources of vitamin A, are retinol and retinyl esters contained in animal foods. Another class of substances is vitamin A procarotenoids, carotenoids that are carotenoids from plant food that can transform in vivo to produce retinol, the precursor substances of dietary retinol, mainly including β-carotene, α-carotene and β neaxanthin.
Vitamin A is a fat-soluble vitamin that can be soluble in most organic solvents to varying degrees, but insoluble in water. Phospholipids, vitamin E or other antioxidants in foods have effects in improving the stability of vitamin A
Although vitamin A can be extracted from animal tissues, resources are relatively scattered, complex steps and high costs, so commodity vitamin A are chemically synthetic products. Industrial synthesis of vitamin A at home and abroad mainly has two synthetic process routes: Roche in Switzerland and BASF in Germany.
Roche: β-Violandone as the starting ingredient, characterized by the Gergian reaction, through the DArzens reaction, lattice reaction, selective hydrogenation, hydroxybromide, and debromide.
BASF: Typical feature is the Wittng reaction, by lattice reaction with β-acetone and acetylene, ethylene was selected to obtain ethylene- β-violet alcohol, and after Wittng reaction, with alcohol sodium as the catalyst, condensation with C 5 aldehyde to produce vitamin A acetate
Common methods for detecting vitamin A mainly include Colorimetry, ultraviolet spectrophotometry(UV), near-infrared spectrometry(NIR), and High Performance Liquid Chromatography(HPLC).
Vitamin A has a wide and important physiological functions in the human body, which mainly includes visual, regulation of cell proliferation and differentiation, intercell information communication and immune response. Its lack of abnormal physiological function and pathological changes.
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