Tannic acid

CAS 1401-55-4C76H52O46Acids & Bases

Tannic acid (CAS: 1401-55-4, C76H52O46) is a complex polyphenol, often referred to as a hydrolyzable tannin. This amorphous, yellowish-white to light-brown powder is soluble in water and alcohol. Its astringent properties and ability to precipitate proteins make it valuable in various industrial and laboratory applications, including as a mordant in dyeing and in analytical chemistry.

IUPAC: Gallotannin,Tannin
Synonyms: GallotanninTannin

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Tannic acid (C76H52O46) — chemical structure, CAS 1401-55-4; Chemistry, fine chemical supplied by Tech Serve Solutions

AcidsAcids & BasesChemical SynthesisOrganic AcidsSynthetic Reagents

01 /Applications

Mordant in Dyeing

Tannic acid acts as a mordant, helping to fix dyes to fabrics. It forms a complex with the dye and the fibre, improving the colour fastness and vibrancy of dyed materials.

Analytical Reagent

It is used in analytical chemistry for the gravimetric determination of certain metals and alkaloids. Its protein-precipitating ability is also leveraged in various analytical methods.

Leather Tanning

Traditionally used in leather tanning processes, tannic acid helps to convert animal hides into leather by cross-linking collagen fibres, increasing their stability and resistance to decay.

Adhesive Component

In some adhesive formulations, tannic acid can be used as a component, contributing to binding properties due to its reactive functional groups.

02 /Properties

Molecular weight	1701.20
Empirical formula	C76H52O46
Assay	95.0%
Autoignition temp	980 °F
Loss on drying	≤12.0% loss on drying, 105°C
Melting point	218 °C(lit.)

03 /Safety & handling

Precautionary statements

P273Avoid release to the environment

Protective equipment	Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
Flash point	199 °C / 390.2 °F
Water hazard class (WGK, DE)	2
Cation traces	Zn: ≤0.005%heavy metals: ≤0.003%
Ignition residue	≤0.5%

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

1401-55-4

MDL number

MFCD00066397

PubChem substance

24865158

Beilstein registry

8186396

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

06 /Frequently asked questions

What is Tannic acid used for?

Tannic acid is used as a mordant in dyeing, an analytical reagent, in leather tanning, and as a component in some adhesives. It is also known for its protein-precipitating and astringent properties.

What is the CAS number and molecular formula for Tannic acid?

The CAS number for Tannic acid is 1401-55-4, and its molecular formula is C76H52O46.

What grade and purity does Tech Serve Solutions supply for Tannic acid?

Tech Serve Solutions supplies Tannic acid with an assay of 95.0%. We do not represent this product as USP, BP, or EP grade.

How should Tannic acid be handled safely?

Handle Tannic acid with appropriate personal protective equipment, including eyeshields and gloves. Use a type N95 (US) or type P1 (EN143) respirator filter if airborne exposure is possible. Avoid release to the environment (P273).

How is Tannic acid packed and exported by TSS?

Tannic acid is carefully packed to maintain its integrity during transit and is exported globally by Tech Serve Solutions, adhering to all necessary shipping regulations.