403040

Tannic acid

ACS reagent

• Synonym(s): Gallotannin, Tannin
• Empirical Formula (Hill Notation): C₇₆H₅₂O₄₆
• CAS Number: 1401-55-4
• Molecular Weight: 1701.20
• Beilstein/REAXYS Number: 8186396
• EC Number: 215-753-2
• MDL number: MFCD00066397
• UNSPSC Code: 12352100
• PubChem Substance ID: 24865158
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 200
• form: powder or solid
• autoignition temp.: 980 °F
• ign. residue: ≤0.5%
• loss: ≤12.0% loss on drying, 105°C
• mp: 218 °C (lit.)
• cation traces: Zn: ≤0.005%; heavy metals: ≤0.003%
• functional group: ester; ether
• SMILES string: Oc1cc(cc(O)c1O)C(=O)Oc2cc(cc(O)c2O)C(=O)OC[C@H]3O[C@@H](OC(=O)c4cc(O)c(O)c(OC(=O)c5cc(O)c(O)c(O)c5)c4)[C@H](OC(=O)c6cc(O)c(O)c(OC(=O)c7cc(O)c(O)c(O)c7)c6)[C@@H](OC(=O)c8cc(O)c(O)c(OC(=O)c9cc(O)c(O)c(O)c9)c8)[C@@H]3OC(=O)c%10cc(O)c(O)c(OC(=O)c%11cc(O)c(O)c(O)c%11)c%10

Description

General description

Tannic acid (TA) is a natural, non-toxic organic acid with corrosion inhibitive property for metals and alloys.[1] A chemiluminescence (CL) system of KIO₄ (potassium periodate)–H₂O₂ (hydrogen peroxide)–Tween40 has been employed in the detection of tannic acid in industrial wastewater.[2] Tannic acid hydrolyzes to form mainly glucose and gallic acid. Its astringent property is due to the presence of polyphenolic groups.[3]

Application

Tannic acid may be used in the following processes:

• Synthesis of ferric tannate complexes by reacting with metallic iron.[4]
• As a protein deproteinizing agent in genomic and plasmid DNAs preparation.[5]
• As a reductant in the synthesis of metal nano particles.[6]

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 2
• flash_point_f: 390.2 °F
• flash_point_c: 199 °C
• ppe: Eyeshields, Gloves, type N95 (US)