≥95% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Protected from light,Room temperature,Argon charged Ships Normal Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 1389 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
Product Introduction
Slightly special smell, strong astringency, exposure to light and deep color change in the air. Soluble in water, easily soluble in ethanol, acetone and glycerol, almost insoluble in ether, benzene, chloroform and petroleum ether. Slightly special smell and strong astringency.
Pale yellow amorphous powder or loose shiny scaly or spongy solid, which is mostly decomposed into pyrogallic acid and carbon dioxide at 210-215℃. 1g is dissolved in 0.35ml water and 1ml hot glycerin. It is odorless and flammable. When exposed to albumin, starch, gelatin, and many alkaloids and metal salts, they precipitate, and when exposed to iron salts, they also produce black or precipitate. Autoignition point 526.6℃; The median lethal dose (LD) (rabbit, oral) was 5.0g/kg.
Tannin is not a single compound, but its chemical composition is complex and can be roughly divided into two types:
(1) condensed tannin is flavanol, and the 2-position of flavanol in the molecule is combined with catechol or phloroglucinol through carbon-carbon bond.
② Hydrolyzable tannin, with ester bond in its molecule, is gallic acid ester of glucose. The latter is commonly used tannin. Tannin from Chinese gallnut contains about 12% glucose, and tannin from Turkish gallnut contains about 16.5% glucose.
Product Usage
Precipitation and gravimetric determination of beryllium, aluminum, gallium, indium, niobium, tantalum and zirconium. Comparative determination of copper, iron, vanadium, cerium and cobalt. Precipitators for proteins and alkaloids. External indicator for titration of lead with ammonium molybdate. Dye mordant.
Iron tannin complex was synthesized by reaction with metallic iron. Deproteins in the preparation of genome and plasmid DNA. As a reducing agent in the synthesis of metal nanoparticles.
Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS →Lot-specific quality data. Enter your lot number to retrieve the exact COA.
Look up COA →Full quality attributes and acceptance criteria for this grade.
View spec sheet →Taxonomy Tree
| Kingdom | Organic compounds |
|---|---|
| Superclass | Phenylpropanoids and polyketides |
| Class | Tannins |
| Subclass | Hydrolyzable tannins |
| Intermediate Tree Nodes | Not available |
| Direct Parent | Hydrolyzable tannins |
| Alternative Parents | Depsides and depsidones Galloyl esters p-Hydroxybenzoic acid alkyl esters m-Hydroxybenzoic acid esters Phenol esters Pyrogallols and derivatives Phenoxy compounds Benzoyl derivatives Catechols 1-hydroxy-2-unsubstituted benzenoids 1-hydroxy-4-unsubstituted benzenoids Oxanes Monosaccharides Carboxylic acid esters Oxacyclic compounds Acetals Polyols Organic oxides Hydrocarbon derivatives |
| Molecular Framework | Aromatic heteromonocyclic compounds |
| Substituents | Hydrolyzable tannin - Depside backbone - Galloyl ester - Gallic acid or derivatives - P-hydroxybenzoic acid alkyl ester - M-hydroxybenzoic acid ester - P-hydroxybenzoic acid ester - Dihydroxybenzoic acid - Phenol ester - Benzoate ester - Benzenetriol - Benzoic acid or derivatives - Pyrogallol derivative - Phenoxy compound - Catechol - Benzoyl - Phenol - 1-hydroxy-4-unsubstituted benzenoid - 1-hydroxy-2-unsubstituted benzenoid - Monosaccharide - Oxane - Benzenoid - Monocyclic benzene moiety - Carboxylic acid ester - Polyol - Acetal - Carboxylic acid derivative - Organoheterocyclic compound - Oxacycle - Hydrocarbon derivative - Organic oxide - Organic oxygen compound - Organooxygen compound - Aromatic heteromonocyclic compound |
| Description | This compound belongs to the class of organic compounds known as hydrolyzable tannins. These are tannins with a structure characterized by either of the following models. In model 1, the structure contains galloyl units (in some cases, shikimic acid units) that are linked to diverse polyol carbohydrate-, catechin-, or triterpenoid units. In model 2, contains at least two galloyl units C-C coupled to each other, and do not contain a glycosidically linked catechin unit. |
| External Descriptors | tannin |
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Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Date | Item |
|---|---|---|---|
 G2615404 | Certificate of Analysis | Jul 02, 2026 | T305809 |
| G2615617 | Certificate of Analysis | Jul 02, 2026 | T305809 |
| G2615619 | Certificate of Analysis | Jul 02, 2026 | T305809 |
| G2615621 | Certificate of Analysis | Jul 02, 2026 | T305809 |
| F2626053 | Certificate of Analysis | Jan 30, 2026 | T305809 |
| E2606049 | Certificate of Analysis | Jan 30, 2026 | T305809 |
| B2626643 | Certificate of Analysis | Jan 30, 2026 | T305809 |
| B2626644 | Certificate of Analysis | Jan 30, 2026 | T305809 |
| B2626645 | Certificate of Analysis | Jan 30, 2026 | T305809 |
| B2626646 | Certificate of Analysis | Jan 30, 2026 | T305809 |
| K2514598 | Certificate of Analysis | Nov 05, 2025 | T305809 |
| K2514597 | Certificate of Analysis | Nov 05, 2025 | T305809 |
| K2514595 | Certificate of Analysis | Nov 05, 2025 | T305809 |
| H2521513 | Certificate of Analysis | Aug 02, 2025 | T305809 |
| H2521512 | Certificate of Analysis | Aug 02, 2025 | T305809 |
| H2521515 | Certificate of Analysis | Aug 02, 2025 | T305809 |
| H2521731 | Certificate of Analysis | Aug 02, 2025 | T305809 |
| A2623052 | Certificate of Analysis | Aug 02, 2025 | T305809 |
| H2507136 | Certificate of Analysis | Apr 07, 2025 | T305809 |
| D2523276 | Certificate of Analysis | Apr 07, 2025 | T305809 |
| D2523278 | Certificate of Analysis | Apr 07, 2025 | T305809 |
| D2525492 | Certificate of Analysis | Apr 07, 2025 | T305809 |
| D2525493 | Certificate of Analysis | Apr 07, 2025 | T305809 |
| F2518070 | Certificate of Analysis | Apr 07, 2025 | T305809 |
| L2319265 | Certificate of Analysis | Nov 13, 2023 | T305809 |
| L2319135 | Certificate of Analysis | Nov 13, 2023 | T305809 |
| L2319137 | Certificate of Analysis | Nov 13, 2023 | T305809 |
| L2319251 | Certificate of Analysis | Nov 13, 2023 | T305809 |
| D2409006 | Certificate of Analysis | Nov 13, 2023 | T305809 |
| D2307026 | Certificate of Analysis | Feb 27, 2023 | T305809 |
| F2306066 | Certificate of Analysis | Feb 27, 2023 | T305809 |
| D2307032 | Certificate of Analysis | Feb 27, 2023 | T305809 |
| D2307033 | Certificate of Analysis | Feb 27, 2023 | T305809 |
| D2307038 | Certificate of Analysis | Feb 27, 2023 | T305809 |
| D2307039 | Certificate of Analysis | Feb 27, 2023 | T305809 |
| H2324310 | Certificate of Analysis | Feb 27, 2023 | T305809 |
| H2302244 | Certificate of Analysis | Feb 27, 2023 | T305809 |
| D2307043 | Certificate of Analysis | Feb 27, 2023 | T305809 |
| J2308030 | Certificate of Analysis | Dec 29, 2022 | T305809 |
| A2330195 | Certificate of Analysis | Dec 29, 2022 | T305809 |
| A2330194 | Certificate of Analysis | Dec 29, 2022 | T305809 |
| A2330133 | Certificate of Analysis | Dec 29, 2022 | T305809 |
| A2330128 | Certificate of Analysis | Dec 29, 2022 | T305809 |
| A2330119 | Certificate of Analysis | Dec 29, 2022 | T305809 |
| A2330112 | Certificate of Analysis | Dec 29, 2022 | T305809 |
| C2210057 | Certificate of Analysis | Jul 05, 2021 | T305809 |
| Solubility | Soluble in water, warm glycerol, alcohol and acetone. |
|---|---|
| Sensitivity | Air & Light Sensitive |
| Flash Point(°F) | 390.2 °F |
| Flash Point(°C) | 199 °C |
| Melt Point(°C) | 210-215°C |
| Molecular Weight | 1701.200 g/mol |
| XLogP3 | 6.200 |
| Hydrogen Bond Donor Count | 25 |
| Hydrogen Bond Acceptor Count | 46 |
| Rotatable Bond Count | 31 |
| Exact Mass | 1700.17 Da |
| Monoisotopic Mass | 1700.17 Da |
| Topological Polar Surface Area | 778.000 Ų |
| Heavy Atom Count | 122 |
| Formal Charge | 0 |
| Complexity | 3570.000 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 5 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| The total count of all stereochemical bonds | 0 |
| Covalently-Bonded Unit Count | 1 |
