- Tannic acid (also
known as gallotannic acid, gallotannin, digallic acid or glycerite)
is a plant polyphenol which is contained in roots, husks, galls and
leaves of plants.
- Tannins are non-crystallizable,
amorphous compounds. They are soluble in water, ethyl alcohol,
glycerol, acetone and in dilute alkalies. Their aqueous solution
shows an acidic reaction and a sharp astringent taste.
- Tannic acid is not a
single constituent but a type of hydrolyzable tannin that contains
several units of gallic or ellagic acids esterified with the
glucosyl OH to produce complex tannin compounds. Its exact
composition varies according to its source.
- Tannic acid has strong
astringent properties. It is used as an antidote in cases of
alkaloidal poisoning as it precipitates alkaloids as tannate salts.
It finds its uses in tanning, dyeing industries and for ink
manufacture.
- Tannin is an ideal
candidate for commercial extraction since it finds a ready market in
leather industry and ayurvedic medical prescriptions.
- Terminalia arjuna is
one of the major tannin yielding trees with tannin content of 22-24
percent in bark, 10-11 percent in leaf and 7-20 percent in fruit.
Tannic acid is a specific commercial
form of tannin, a type of polyphenol. Its weak acidity (pKa around
10) is due to these phenol groups in the structure.
- Commercial tannic acid is usually
extracted from any of the following plant part: Tara pods (Caesalpinia
spinosa), gallnuts from Rhus semialata or Quercus infectoria or
Sicilian Sumac leaves (Rhus coriaria).
- Tannic acid (TAN-ik AS-id) is a pale
yellow amorphous powder, shiny scales, or spongy material that
gradually darkens when exposed to air. It is odorless but has a
strong, bitter taste.
- Tannins are a basic ingredient in the
chemical staining of wood, and are already present in woods like
oak, walnut, and mahogany.
- Tannin occurs naturally in tea,
coffee, oak, sumac bark and myrobalan.
- Tannic acid can be applied to woods
low in tannin so chemical stains that require tannin content will
react.
- The presence of tannins in the bark of
redwood (Sequoia) is a strong natural defense against wildfire,
decomposition and infestation by certain insects such as termites.
It is found in the seeds, bark, cones, and heartwood.
- Tannic acid is a common mordant used
in the dyeing process for cellulose fibers such as cotton, often
combined with alum and/or iron.
- Tannic acid is used in the
conservation of ferrous (iron based) metal objects to passivate and
inhibit corrosion.
- Tannic acid reacts with the corrosion
products to form a more stable compound, thus preventing further
corrosion from taking place. After treatment the tannic acid residue
is generally left on the object so that if moisture reaches the
surface the tannic acid will be dehydrated and prevent or slow any
corrosion.
- Use of tannic acid in food
applications is far more widespread and significant amounts are used
as process aids in beer clarification, aroma compound in soft drinks
and juices.
- Today tannic acid is still used in
pharmaceutical applications to produce albumine tannate which is
used as an anti-diarrhea agent.
- Tannic acid is also used to produce
tannate salts of certain anti-histamins and anti-tussives to impart
increased stability or slow release properties to the API (active
pharmaceutical ingredient).
- In manufacturing, tannic acid is used
in ointments and suppositories for the treatment of hemorrhoids; for
tanning hides and manufacturing ink; and to kill dust mites on
furniture.
- Tannic acids help eliminate diarrhea,
reduce swelling of hemorrhoids, loosen catarrh in the respiratory
system, and control various kinds of internal bleeding. Externally,
tannins are beneficial in rubs for aching muscles and joints, in
salves for open, slow-healing sores, and as antiseptics.
- Plants high in tannic acid have been
used to treat cancers, but tannic acid itself has been found to be
carcinogenic under certain conditions.
- Several Studies have shown tannic acid
has antiviral, antimicrobial, and antibacterial properties. In many
cases it acts directly on the organism to inactivate it.
- Tannins have also been implicated in
hyaluronidase system. That is, they destroy hyaluronidase in much
the same manner as does echinacea, thereby defending the cells of
the body against viral invasion.
- Tannic acid-HCl, the
prime reagent for the oxidized tannin-azo
method, is brownish yellow in color. This solution gave a deep brown
precipitate on treatment with an equal volume of periodic acid.
- Tannic acid is most
effectively bound at acid pH; this suggests that positively charged
amino groups in the tissue proteins are the loci responsible for
attachment of tannin. This view was substantiated by the
observations on sections pretreated with formaldehyde.
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Introduction
- Tannic Acid
- Overview Information
- Tannic Acid Properties
- What is Tannic Acid?
- Tannin Containing Drugs
- Tannic Acid - Info
- Tannic Acid - Introduction
Production Process
- Extraction of Tannin by Acacia mearnsii
with Supercritical Fluids
- Extraction of Tannin from the bark of
Arjuna Tree
- Condensed Tannins
- Electrocoagulation and recovery of
tannins from tree barks
- Evaluation of Phytochemical
standards and In
Vitro Antioxidant Activity of tannins rich fraction of Stem Bark of Bridelia retusa
- Experiments on the Origin of
Oak-Bark Tannin
- The Origins of Tannins
- Tannin Extraction from the Bark of Pinus
oocarpa var. oocarpa
- Seasonal Dynamics in the Nutritional
and Antinutrional status of stem bark of Anogeissus Latifolia
- Abstract for solvent
free production
Studies
- Copper complexation by tannic acid in
aqueous solution
- Determination of antimicrobial
activity of tannic acid in pickling process
- Electrochemical Studies of
Dopamine and Epinephrine at a Poly (Tannic Acid) Modified Carbon Paste
Electrode
- Tannic Acid Fermentation
- Fractionation of Tannic Acid
- Polyphenol tannic acid inhibits
hydroxyl radical formation from Fenton reaction
- Tannic Acid Is an Inhibitor
- Liver Proteolytic Activity in Tannic
Acid-Fed Birds
- Synthesis and Biological Activity of
Polygalloyl-Dendrimers as Stable Tannic Acid Mimics
- Toxicity Studies on Tannic Acid
- Tannic Acid Treatment
Products
- Tannic Acid Tanex
- Dry Powdered Tannin
- Tannic Acid - Product
- Tannin
- Tannic Acid
MSDS
- Tannic Acid - Msds
- Tannic Acid / Tannins
- Anco Tannic Acid Plate Etch
- Tannic Acid, GR
- Gallotannin
- Tannic Acid
- Tannic acid-granular
- Tannic Acid Solution
- Msds of Tannic Acid
- Tannic acid MSDS
- Tannic Acid
Uses
- Accelerated Bioconversion of
Agricultural
By-Products by Supplementation of Tannic Acid in Tannase Production by Aspergillus Oryzae
- Animal Experiments with Tannic acid
- Burns Treated by Tannic Acid
- Tannins of Deciduous Trees Bard as a
Potential Source for Obtaining ecologically safe wood adhesives
- Dyes and Dyeing
- Use of Tannins in Chinese Medicine
- The Germicidal Effects of Tannic Acid
- Leather Tanning
- The Use of Tannic Acid
- Production of Tannase through Submerged
Fermentation of Tannin - containing Plant extracts by Bacillus
licheniformis
- On the role of Phenols, Tannic Acids, and
Oxybenzoic Acids in Cork Formation
- Dyeing Extracts and Tannins in the Textile
Industry
- Oxidized Tannin - Azo Method for Protein in
Tissues
Technology
-
Growth responses of in vitro Fusarium
oxysporum f. sp. niveum to external supply of tannic acid
-
Method for Quantitative Determination of
Polyphenolic Compounds and Tannins from Vegetal Products
-
Optimization of Process Parameters
for the Production of Tannase and Gallic Acid by Enterobacter Cloacae
-
Tannic Acid removal from aqueous
effluents using micellar enhanced ultrafiltration at pilot scale
-
Shrinking gold nanoparticles:
dramatic effect of a cryogenic process on
tannic acid/ sodium citrate-generated gold nanoparticles
-
Spectrophotometric assay of
immobilized tannase
-
Structural features of takiaik acid
important for DNA in the presence of Cu(H)
-
A Technique for Ebonizing Wood
-
Optimization of Various
Culture Media for Tannase Production in Submerged Fermentation by
Aspergillus flavus
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Patents
- Method of treating cancer with tannic acid
- Tannic acid compositions for
treating cancer
- Tannic acid-adsorbed silicon oxide
used as resin additive
- Wine stabilization using immobilized tannic
acid
- Compositions comprising
tannic acid as corrosion inhibitor
- Contraceptive method and
composition containing tannic acid
- Tannin (tannic acid)
treatment of athlete's foot and other fungal infections
- Process for producing
granule coated with tannic acid metal chelate compound
- Use of tannic or gallic acid to produce low
beverage soluble iron content filter aid
- Composition for Prevention of
Influenza Viral Infection Comprising Tannic Acid, Air filter comprising
the same and air cleaner device comprising the filter
- Process for purifying tannic
acid
- Composition and
method of treating cancer with tannic acid and tannin complexes
Raw Materials
- Herbasol
Extract Oak Bark
- NAB
Willowbark Extract
- Pine Bark
Extract
- Punica
Granatum
- Quillaia
Extracts
- Terminalia catappa
- White
Willow Bark (Salix alba)
Toxicity
- Acute Toxicity
- Food Intake Depression
and Other Metabolic Effects of Tannic Acid in the Rat
- Metabolic Fate of Dietary
Tannins in Chickens
- Nutritional toxicology of
tannins and related polyphenols in forage legumes
- Thiopental Anesthesia and
Tannic Acid Diagnostic Enemas
- Toxicity Studies on
Tannic Acid
Plant and
Equipment Suppliers
- Company from Germany
- Tannin Extraction plant
- Another Company from Germany
- Company from South Africa
- Company from India
Company Profiles
- Company from Maharashtra (India)
- Company from Pennsylvania
- Company from Belgium
- Another Company from Pennsylvania
- Company from Hampshire
- Company from China
- Another Company from China
- Company from Punjab(India)
- Another Company from China
Suppliers
- Suppliers List
- Worldwide Suppliers
- Manufacturers
Consultants
-
Consultancy Services
-
Company from Australia
-
Leather Tanning Consulting
-
Consultant from India
-
Consultant
Reports
- Tannic Acid-induced Nucleolar Changes
- Chemical interactions between thiamin and tannic acid
- Chile grows its own Tannin
-
A Comparison of Topical Tannic Acid
Versus Iontophoresis in the medical treatment of Palmar Hyperhidrosis
- Drug Delivery Systems based on Collagen -
Tannic Acid Matrices
-
Influence of Citric And Tannic Acids
on Hydroxy - Al Interlayering in Montmorillonite
-
Mayers's Tannic Acid - Ferric Chloride
Stain for Mucins
- The Preservation of Ultrastructure
in saturated phosphatidyl cholines by tannin acid
- Production and Standards for Chemical
Non-Wood
Forest Products in China
-
Tannin Removal
-
Tannic Acid from Water or Methanol
-
Tannic Acid may boost
Beef quality
- The Market
Potential of Tannin Related Innovations in the
Wine Industry
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