E-5,3′,4′-trihydroxy-3-glucopyranosylstilbene
The chemical formula for Astringin is C20H22O9. The molecular weight is 406.4 g/mol. The product belongs to the stilbenoids, which is a class of natural water-soluble chemicals. The product is easily isomerised upon UV-B radiation.
PHYSICAL CHARACTERISTICS
The product shall be brown in colour and shall normally be powdered.
COMPOSITION STATEMENT
The product has a purity >97% as detected by high- performance liquid chromatography (HPLC) connected to UV /Vis detector at 320nm and total absorbance (TIC) 230-600 nm.
STORAGE REQUIREMENTS
The product should be kept in darkness and at low temperatures for storage more than a few days (< -5°C).