| Identification | Back Directory | [Name]
D-glucose pentakis[3,4-dihydroxy-5-[(trihydroxy-3,4,5-benzoyl)oxy]benzoate] | [CAS]
72401-53-7 | [Synonyms]
D-glucose pentakis[3,4-dihydroxy-5-[(trihydroxy-3,4,5-benzoyl)oxy]benzoate] | [EINECS(EC#)]
276-638-0 | [Molecular Formula]
C76H52O46 | [MOL File]
72401-53-7.mol | [Molecular Weight]
1701.2 |
| Hazard Information | Back Directory | [Chemical Properties]
Amorphous powder with a yellowish-white to light brown color, or in the form of flakes, sponges, or lumps. It has a distinctive odor. It tastes astringent and has astringent properties. The moisture content in general products is about 10%. It gradually oxidizes to brown in air and light, and decomposes into pyrogallol and carbon dioxide gas when heated to 210-215°C. It can be precipitated by proteins, starch, gelatin, most alkaloids, and sodium metal salts. When it comes into contact with trivalent iron salts, it becomes a black pigment and precipitates. It is easily soluble in water (300%), hot glycerol (1:1), ethanol, acetone, etc., but is almost insoluble in benzene, chloroform, ether, and hexane solvents, and is poorly soluble in anhydrous ethanol. The aqueous solution is acidic. Natural products are widely found in the roots, bark, stems, leaves, and fruits of plants. | [Definition]
ChEBI: Tannic acid is a gallotannin obtained by acylation of the five hydroxy groups of D-glucose by 3,4-dihydroxy-5-[(3,4,5-trihydroxybenzoyl)oxy]benzoic acid (a gallic acid dimer). It has a role as a carcinogenic agent, a metabolite and a geroprotector. It is a gallotannin, a D-glucoside and a monosaccharide derivative. It is functionally related to a gallic acid. |
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