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Phlobaphen
Phlobaphenes (or phlobaphens, CAS No.:71663-19-9) are reddish, alcohol-soluble and water-insoluble phenolic substances. They can be extracted from plants, or be the result from treatment of tannin extracts with mineral acids (tanner's red). The name ''phlobaphen'' come from the Greek roots φλoιὀς (''phloios'') meaning bark and βαφή (''baphe'') meaning dye. No biological activities have currently been reported for phlobaphenes. Phlobaphenes from hawthorn fruits (''Fructus Crataegi'') may have a specific action on the coronary circulation. They are converted into humins in soils. Naturally formed phlobaphenes Natural phlobaphenes are the common bark, pericarp, cob glume and seed coat (''testa'') pigments. They have not been found in flowers, unless the brown and black pigments in the involucrum of certain compositae are found to be of the phlobaphene type. In bark, phlobaphenes accumulate in the phellem layer of cork cambium, part of the suberin mixture. Occurrence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kinotannic Acid
Kinotannic acid is the chief constituent of the kino gum, of which it contains 70 to 80 per cent. Kino also contains kino red, a phlobaphene produced from kinotannic acid by oxidation. It is closely related to the tannin from catechu ( or ) is an extract of acacia trees used variously as a food additive, astringent, tannin, and dye. It is extracted from several species of ''Acacia'', but especially ''Senegalia catechu'' (''Acacia catechu''), by boiling the wood in wate ...; its non-glucosidal nature was established by Bergholz. Properties When dry distilled it yields pyrocatechine and protocatechinic acid. It is soluble in water. Solutions are precipitated by lead or copper salts. Kinotannic acid is degraded by oxidation when exposed to air. References Tannins {{polyphenol-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
