Tannin
Food- and pharma-grade Tannin (tannic acid, CAS 1401-55-4), ≥95% gallotannins, supplied wholesale by Zyntex. For wine and beverage clarification, leather tanning, dyeing, inks and rust converters. CoA and SDS with every lot.
Description
Tannin Product Overview
Tannic acid is a hydrolyzable tannin, a mixture of glucose esters of gallic acid. It is a light yellowish-brown amorphous powder with an astringent taste that dissolves easily in water and alcohol. Producers extract it mainly from gallnuts and tara pods.
It binds strongly to proteins and metal ions. Winemakers and brewers use this property to clarify and stabilize wine, beer and juices, because it precipitates unstable proteins; it is often used alongside acids such as Tartaric Acid. In leather processing, it contributes to vegetable tanning, and in textile dyeing it acts as a mordant.
Its reaction with iron forms dark iron tannate, the basis of traditional iron gall inks and of rust converters that turn rust into a stable protective layer. Pharmaceutical and cosmetic producers use it as an astringent ingredient. For other plant phenolics, see Ferulic Acid.
Key Applications of Tannin
Main application areas:
🍷 Wine and Beverages
Clarifying and stabilizing agent for wine, beer and juices.
👞 Leather
Component of vegetable tanning processes.
🎨 Dyeing and Inks
Mordant in textile dyeing and component of iron gall inks.
🔧 Rust Conversion
Active in rust converters and primers.
Tannin Technical Specifications
| Parameter | Standard Value |
|---|---|
| Product Name | Tannin (Tannic Acid – Food / Pharma Grade) |
| CAS Number | 1401-55-4 |
| EC Number | 215-753-2 |
| Assay / Purity | ≥ 95.0% (Hydrolyzable Gallotannins Content) |
| Appearance | Light yellowish-brown to amorphous powder |
| Heavy Metals (as Pb) | ≤ 10 ppm |
| Residue on Ignition | ≤ 0.1% |
| Documents | CoA and SDS with every lot |
⚠️ Safety & Handling: May cause skin and eye irritation and is harmful to aquatic life. Avoid dust formation and wear gloves, eye protection and dust protection. Store in tightly closed, light-resistant containers in a cool, dry place, away from iron and oxidizers. Always consult the Safety Data Sheet (SDS) for full classification and handling instructions.
Frequently Asked Questions
How is tannin used in winemaking?
It binds and precipitates unstable proteins, helps clarification and stabilizes color and structure. Dosage depends on the wine and is usually set by trials.
Why does tannin turn dark in contact with iron?
It forms iron tannate complexes, which are dark blue-black. This reaction is used in iron gall inks and rust converters but should be avoided in food processing equipment.
How can I get a price and documents?
Prices depend on quantity, packaging and destination. Contact us with your required volume to receive a quotation together with the CoA and SDS.
