tannic acid, CAS No. 1401-55-4

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1401-55-4

Catalog No. EBD2199648

CAS 1401-55-4

Name tannic acid

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Basic Information

Synonyms: Tannicacid Chinesetannin Gallotannicacid Gallotannin Galloylglucose Glycerite PentaNMdigalloylglucose Quebracho Tannins 1,3,6-tris-O-(3,4,5-trihydroxybenzoyl)hexopyranose 1,2,3,4,6-pentakis-O-[(3,4-dihydroxy-5-{[(3,4,5-trihydroxyphenyl)carbonyl]oxy}phenyl)carbonyl]hexopyranose

Molecular Formula: C6H6O6

Molecular Weight: 174.11

Categories: Functional Chemicals > Food Additives and Ingredients > Antioxidants Functional Chemicals > Consumer & Industrial Chemicals > Industrial Auxiliaries Medicinal Chemistry > Biochemicals and Life Science Reagents > Phytochemicals and Natural Products

Product Description:

Tannic acid is a type of polyphenol, specifically a hydrolyzable tannin, composed of a central glucose core esterified with multiple gallic acid units. It is a natural product widely extracted from plant sources such as oak galls, sumac, and tea leaves. It appears as a light yellow to brown amorphous powder and is soluble in water, alcohol, and acetone. Its primary applications are diverse and span several industries. In the food industry, it is used as a clarifying agent in beverages (like wine and beer), a flavoring agent, and a natural antioxidant to prevent rancidity. In industrial contexts, it serves as a mordant in dyeing, a coagulant in water treatment, and a key component in leather tanning (from which its name derives). In pharmaceuticals and cosmetics, it is valued for its astringent, anti-inflammatory, and antimicrobial properties, and is used in topical preparations for treating minor wounds, burns, and skin conditions. Tannic acid also finds significant use in life science research as a standard polyphenol and a protein precipitating agent. It is known to form complexes with proteins, alkaloids, and heavy metals, which underpins many of its biological and industrial functions. Safety considerations include potential irritation upon inhalation or contact with eyes, and it should be handled with appropriate personal protective equipment.

Physical Properties

Melting Point: 218 °C(lit.)

Flash Point: 199 °C

Density: 2.12 g/cm3

Solubility: H<SUB>2</SUB>O: soluble1 gm in 0.35ml

Analytical Data

Appearance: light yellow to tan solid with a faint odor