The 3-O-glycosides of Cyanidin: β-glucopyranoside, β-galactopyranoside and -arabinopyranoside
The chemical formula and molecular weights for the respective glucosides are:
- Cy 3-glc: C21H21O11Cl, Mr=484.5
- Cy 3-gal: C21H21O11Cl, Mr=484.5
- Cy 3-ara: C20H19O10Cl, Mr=454.5
The mixture contains 8 mmole of each compound. Netweight is 12mg. The product belongs to the anthocyanins which is a class of natural chemicals belonging to the flavonoids. It is highly water-soluble and is easily degraded by hydrolysis and /or hydrogenation at temperatures >40°C.
The product shall be dark red /purple in colour and shall normally be powdered.
The product has a purity >97% as detected by high- performance liquid chromatography (HPLC) connected to UV /Vis detector at 280nm and 520nm. The rest is impurities of other anthocyanins, flavonoids or polyphenols.
The product should be kept in darkness and at low temperatures for storage more than a few days (< -5°C).