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  • Gallic Acid Preparation

    Gallic Acid Preparation

    Acid Hydrolysis The acid hydrolysis method is mainly divided into one-step method and two-step method. The main process flow of two-step preparation of gallic acid raw material → hot water extraction → filter residue → t...
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  • Tannic Acid

    Tannic Acid

    Tannic acid is a specific form of tannin, a type of polyphenol. Its weak acidity (pKa around 6) is due to the numerous phenol groups in the structure. The chemical formula for commercial tannic acid is often given as C76H52O46, which corresponds with decagalloyl glucose,...
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  • Gallic Acid Historical Context and Uses

    Gallic Acid Historical Context and Uses

    Gallic acid is an important component of iron gall ink, the standard European writing and drawing ink from the 12th to 19th centuries, with a history extending to the Roman empire and the Dead Sea Scrolls. Pliny the Elder (23-79 AD) describes the use of gallic acid as a ...
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