CasNo.1401-55-4,Tannic Acid CAS: 1401-55-4 Acidum Tannicum,(1401-55-4) Suppliers

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Keywords

Tannic Acid Acidum Tannicum 1401-55-4

Quick Details

Appearance:liquid
Application:Industrial and medical
PackAge:bags
ProductionCapacity:1000|Metric Ton|Week
Storage:Dry and ventilated
Transportation:We can use express ,air and sea transportation!

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Company info:

Hebei Mojin Biotechnology Co., Ltd, Our company is a professional in lead acetate, diphenyl ethylamine and other chemical raw materials and chemical reagents research and development production enterprises. Our business covers more than 30 countries, most of the big customers come from Europe, America and other countries in the world, we can guarantee the quality and price. In recent decades, with the efforts of all employees, we have established many cooperative companies in shandong, henan, guangdong and other places. Our corporate purpose is based on the market, enhance the strength, take the road of scientific and environmental sustainable development, relying on the country. Technology r & d center, increase the investment in r & d, based on the domestic market, expand the international market, manufacturing quality products, sincere service to the society, into a modern, ecological, scientific and technological enterprise world.

Description

Tannic acid is a specific commercial form of tannin, a type of polyphenol. Its weak acidity (pKa around 10) is due to the numerous phenol groups in the structure. The chemical formula for commercial tannic acid is often given as C76H52O46, which corresponds with decagalloyl glucose, but in fact it is a mixture of polygalloyl glucoses or polygalloyl quinic acid esters with the number of galloyl moieties per molecule ranging from 2 up to 12 depending on the plant source used to extract the tannic acid. 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).
According to the definitions provided in external references such as international pharmacopoeia, Food Chemicals Codex and FAO-WHO tannic acid monograph only tannins sourced from the above-mentioned plants can be considered as tannic acid. Sometimes extracts from chestnut or oak wood are also described as tannic acid but this is an incorrect use of the term. It is a yellow to light brown amorphous powder; 2850 grams dissolves in one litre of water (1.7 moles per liter).
While tannic acid is a specific type of tannin (plant polyphenol), the two terms are sometimes (incorrectly) used interchangeably. The long-standing misuse of the terms, and its inclusion in scholarly articles has compounded the confusion. This is particularly widespread in relation to green tea and black tea, both of which contain tannin but not tannic acid.
Tannic acid is not an appropriate standard for any type of tannin analysis because of its poorly defined composition.

Basic Info

Chemical Name	Tannic acid
Synonyms	Acidum tannicum;Quercotannic acid;Querci-tannic acid;Digallic acid;Gallotannin;Expand
CAS No.	1401-55-4
Molecular Formula	C76H52O46
Molecular Weight	1701.20000
PSA	777.98000
LogP	4.83810

Properties

Appearance & Physical State	light yellow to tan solid with a faint odor
Density	2.12 g/cm3
Melting Point	218 °C (dec.)
Flash Point	198ºC
Refractive Index	1.927
Water Solubility	250 g/L (20 ºC)
Stability	Stable. Incompatible with metallic salts, strong oxidizing agents, iron and other heavy metals.
Storage Condition	Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed. Store protected from light.