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[1] (tanner's red).[2] The name phlobaphen come from the Greek roots φλoιὀς (phloios) meaning bark and βαφή (baphe) meaning dye.[3][4]
No biological activities have currently been reported for phlobaphenes.[5] Phlobaphenes from hawthorn fruits (Fructus Crataegi) may have a specific action on the coronary circulation[citation needed]. They are converted into humins in soils.[6]