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 Chemical 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 which is highly soluble in water; one gram dissolves in 0.35 mL of water.
| Analysis | Specification |
| Appearance | Light Brown Yellow powder |
| Heavy metals | =<20ppm |
| Pb | =<5.0ppm |
| As | =<3.0ppm |
| Ignition residue | =<1.0% |
| Loss on drying | =<9.0% |
| Gum, dextrin | Negative |
| Resin | Negative |
| Solubility | 95% |
| Total of bacteria | =<1000cfu/g |
| Fungi | =<100cfu/g |
| Salmgosella | Negative |
| Coli | Negative |
1, What kinds of certificates can you offer?
Chems is an ISO2008 9001 certified company, as for Tannic Acid, we can offer HAPPC, KOSHER, HALAL Certificates, ect.
2, Is Chems a manufacturer or just a trading company?
Chems is both manufacturer and trading company, we are Tannic Acid distributor, at the same time, we are manufacturer of other products.
3, What is the Min Order Quantity of Tannic Acid?
Different products have different MOQ, for Tannic Acid, the MOQ is 500kg.
4, What is the price of Tannic Acid?
Chems is a famous supplier and manufacturer of Tannic Acid in China, and has been corporate with many Tannic Acid suppliers for several years, we can provide you with cost-effective Tannic Acid.
5, How long shall we wait for your reply?
We can guarantee to reply your inquiries of Tannic Acid in less than 24 hours in working days.
6, What kinds of transportation types can you provide?
Our main transportation methods include air transportation, land transportation and water transportation.
7, What kinds of payment terms can you accept?
The most commonly used payment terms are T/T, L/C, D/P, D/A, etc.
8, How long will I receive my good?
Chems has its own EDC warehouse in Shanghai, when your purchase order has been confirmed, inventory products will deliver within 1 week, other products delivery in 2 weeks.