What is Tannic Acid and how is it identified?

Tannic acid is a hydrolysable tannin mixture also called gallotannic acid or tannin. The product uses CAS 1401-55-4, EINECS 215-753-2 and the representative molecular formula C₇₆H₅₂O₄₆ with molecular weight about 1701.2.

Which specifications should be checked when buying Tannic Acid?

Confirm appearance, assay or tannin content, color, loss on drying, ash, heavy metals and residual solvent if relevant. Light yellow to light brown powder is typical, and the grade should match the intended industrial, analytical or clarification use.

How should Tannic Acid be stored and handled?

Store in tightly closed containers in a cool, dry, light-protected area. Tannic acid can darken on exposure to air or light, so avoid prolonged contact with moisture and use appropriate dust controls and PPE when handling bulk powder.

Tannic Acid CAS 1401-55-4

Tannic Acid (Gallotannin), CAS 1401-55-4, is a hydrolysable tannin used in dyeing, leather tanning, clarification and analytical applications. Confirm the required grade and handling requirements for the intended use.

CAS: 1401-55-4
Synonyms: Gallotannic acid, Tannins, Tanninum, Digallic acid, Gallotannin
Einecs: 215-753-2
Molecular Formula: C₇₆H₅₂O₄₆
Grade: Industrial grade 99%
Package: 200kg iron drum or 50kg plastic drum packing

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Product Description

Tannic Acid is a hydrolysable tannin mixture identified by CAS 1401-55-4 and EC/EINECS 215-753-2.

Synonyms: Gallotannic acid; Tannins; Tanninum; Digallic acid; Gallotannin.

CAS: 1401-55-4.

Molecular formula: C₇₆H₅₂O₄₆.

Molecular weight: 1701.20.

EC number: 215-753-2.

It is a light yellow to light brown amorphous powder with a strong astringent taste; it darkens on exposure to air and light.

It is soluble in water and readily soluble in ethanol, acetone and glycerin, and almost insoluble in ether, benzene, chloroform and petroleum ether.

Typical properties include melting point about 210-215 °C and flash point about 187 °C.

It is used as a dye mordant, leather-tanning and clarification agent, protein or alkaloid precipitant, and analytical reagent for certain metals.

It can also be used in water treatment, ink, wood adhesive and selected industrial formulations.

Confirm appearance, assay or tannin content, color, loss on drying, ash, heavy metals and residual solvent if relevant.

Store in tightly closed containers in a cool, dry, light-protected area.

Confirm the current product-specific specification.

Confirm packaging with the requested quantity and destination requirements.

Document requirements should be confirmed from the current specification, SDS, COA, or other product-specific files.

Regulated-use suitability must be confirmed separately with current product-specific documentation.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended use, required specification, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is Tannic Acid and how is it identified?

A: Tannic acid is a hydrolysable tannin mixture also called gallotannic acid or tannin. The product uses CAS 1401-55-4, EINECS 215-753-2 and the representative molecular formula C₇₆H₅₂O₄₆ with molecular weight about 1701.2.
Q:
What is Tannic Acid used for?

A: It is used as a dye mordant, leather-tanning and clarification agent, protein or alkaloid precipitant, and analytical reagent for certain metals. It can also be used in water treatment, ink, wood adhesive and selected industrial formulations where controlled phenolic or complexing behavior is required.
Q:
Which specifications should be checked when buying Tannic Acid?

A: Confirm appearance, assay or tannin content, color, loss on drying, ash, heavy metals and residual solvent if relevant. Light yellow to light brown powder is typical, and the grade should match the intended industrial, analytical or clarification use.
Q:
How should Tannic Acid be stored and handled?

A: Store in tightly closed containers in a cool, dry, light-protected area. Tannic acid can darken on exposure to air or light, so avoid prolonged contact with moisture and use appropriate dust controls and PPE when handling bulk powder.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

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COA, TDS, SDS/MSDS and packing details are available on request.

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Send the CAS number, grade, quantity, packing preference and destination.

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