The difference between tannic acid and gallic acid
Tannic acid, also known as tannic acid, is a tannin obtained from gallnuts
Release time：
2024-08-20
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Tannic acid, also known as tannic acid, is a tannin obtained from gallnuts. It is a light yellow or light brown amorphous powder or scale; Odorless, with a slight special odor, extremely astringent taste. Soluble in water and ethanol, easily soluble in glycerol, almost insoluble in ether, chloroform, or benzene. Its aqueous solution turns blue black when it meets an iron salt solution, and adding sodium sulfite can delay the color change.
As an astringent, it can precipitate proteins and form insoluble complexes with alkaloids, glycosides, and heavy metals. Mainly used locally, its 11% -20% ointment is used for exudative ulcers, burns, pressure ulcers, hemorrhoids, eczema, etc. Its 15% -20% glycerol solution is used for stomatitis, tonsillitis, pharyngitis, etc. It is also used for detoxification. When poisoned by dehydrated morphine, shidanan, digitalis, lead, silver, copper, zinc, etc., its solution can be used for gastric lavage, and other detoxification drugs have been used instead; When used for colonoscopy, 0.25-0.5% of this product is added to barium sulfate enema to clean the colon and facilitate visualization. Tannic acid can inhibit the activity of snake venom proteins and has a strong detoxification effect on toxins such as cobras (it can also be used for wound cleaning when bitten by venomous snakes). Bacteria in the oral cavity secrete glycosyltransferase, which promotes the synthesis of sucrose and beta glucan. Bacteria adhere to the surface of teeth. The tannins of persimmon powder can prevent bacterial growth, inhibit the activity of glycosyltransferase and glycoside synthesis, thereby reducing the formation of dental caries. Japan already has corresponding products. Treatment of intestinal bacterial infections: such as using RG tannic acid (rhubarb or other plants) as an ADP enzyme inhibitor in combination with other antibiotics. Inhibiting mutations is effective in preventing UV induced skin cancer and aging.
Gallic acid, also known as gallic acid or gallic acid. The scientific name is 3,4,5-trihydroxybenzoic acid. Molecular formula C7H6O5. Gallic acid is easily soluble in water, alcohol, and ether, and is widely present in plants such as Rheum palmatum, Eucalyptus grandiflorus, and Cornus officinalis. It is a naturally occurring polyphenolic compound with wide applications in food, biology, medicine, chemical and other fields.
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