tannic acid

     

Tannic aci, a commercial form of tannin, is a polyphenol. Its weak acidity (pKa around 10) is due to these phenol groups in the structure. Tannic acid is a basic ingredient in the chemical staining of wood. The tannic acid or tannin is already present in woods like oak, walnut, and mahogany. Tannic acid can be applied to woods low in tannin so chemical stains that require tannin content will react.

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  • Jameson Irish Whiskey gains its golden hue thanks partly to this acid that also helps give leather its color

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  • @Ms_Ore tannic acid in the tea and the heat xx
  • #Tannin of tannic acid is responsible for making #teeth darker.
  • #coffee is rich with bioactive substances, such as nicotinic acid, trigonellin, quinolinic acid, tannic acid, pyrogellic acid & #caffeine.
  • .@RARobie they tried to tell us the water was brown because of the tannic acid from the oak trees. Haaahahahahaha ;)
  • Great value! Smooth and rich with ripe fruit, tannic/acid balance and warmth. Wine via @Vivino:
  • @Stuthetraveler yes, tannic acid from oak leaves and acorns. Characteristic of the Suwannee River #floridafacts
  • Synthesis of New Biobased Antibacterial Methacrylates Derived from Tannic Acid and Their Application in UV-Cured...
  • Ebonizing is iron & water & wood's tannic acid combining to make wood grey to black. Simply use galvanized pipe clamps for your glue ups.
  • @dreahoctor yup, tannic acid. lol you can also make like a warm bath and drop like 5 tea bags in there and then soak in there. 😋🙈
  • @rudedoodle I don't know. Could be the tannic acid? splitting hairs aside, it's more about living in obedience to the law. No biggie for me.
  • But learnt that black tea has tannic acid that relieves the burn.
  • Getting Drunk! — drinking Conc. Tannic Acid