Cyanidin

• 2 - ( 3,4- dihydroxyphenyl) - 3,5,7 - trihydroxychromeniumchorid
• 3,5,7,3 ', 4'- Pentahydroxyflavyliumchlorid
• Cyanidin chloride

Deep red odorless solid (as chloride )

Fixed (chloride )

> 300 ° C ( chloride)

• Partially soluble in water ( chloride)
• Soluble sodium in methanol with 0.1% hydrochloric acid

Chloride

Template: Infobox chemical / molecular formula search available

Cyanidin is a simple count of the group of anthocyanidins dye. Cyanidin chloride is partially soluble in water and is an indicator, as the red flavylium cation is protonated at a pH of 6-6.5 to a red-violet product with quinoid structure. Up to pH 8, this color turns by further deprotonation in royal blue. At still higher pH show extracts of black elderberry or red cabbage and green colors.

Occurrence

Cyanidin contained in Glycosidform as anthocyanin found in many plants, including red cabbage, red roses, hibiscus, blueberry, raspberry, plum, elderberry, blackberry, blood orange and rhubarb. In the form of an iron / magnesium / calcium chelate cyanidin causes the blue color of the cornflower (Centaurea cyanus).

Chrysanthemin, Kuromanin ( cyanidin -3-O -glucoside )

Sambicyanin ( cyanidin - 3-O- sambubiosid )

Cyanidin -3-O - glycosides in elderberry

Methyl ether of cyanidin ( peonidin and Rosinidin ) also occur in nature as glycosides.

Rosinidin

Peonidin, peonidin

Peonidin -3-O -glucoside

Cyanidin as an indicator

The structure of cyanidin changes depending on the pH of the environment. Since each structure having a different color, a cyanidin -containing solution for the determination of the pH value over virtually the entire pH range can be used. The 3-O- glycosides and 3,5 -O- diglycosides of cyanidin behave basically the same.