Botanicals:

It is extracted from Chinese Gallnuts ( Galla Chinensis)

Process:

The raw material is extracted using non-toxic solvents, after several purification steps, the concentration is spray-dried to obtain Tannic Acid powder.

Synonyms:

Tannin, Gallotannic Acid

Molecular Formula:

C₇₆H₅₂O₄₆

CAS#

1401-55-4

EINECS:

215-753-2

Molecular Weight:

1701.18

Item

Unit

Specifications (BP/EP)

Appearance

A yellowish-white or slightly brown amorphous light powder

Identification

A. Dilute 0.1 ml of solution S (see Tests) to 5 ml with water R. Add 0.1 ml of ferric chloride solution R1. A blackish-blue colour is produced which becomes green on the addition of 1ml of dilute sulphuric acid R.

B. To 1 ml of solution S, add 3 ml of a 1 g/l solution of gelatin R. The mixture becomes turbid and a flocculent precipitate is formed.

C. Dilute 0.1 ml of solution S to 5 ml with water R. Add 0.3 ml of barium hydroxide solution R. A greenish-blue precipitate is formed.

Assay (on dry basis)

%

≥92

Appearance of Solution

Dissolve 4.0 g in carbon dioxide-free water R and dilute to 20 ml with the same  solvent. Solution S is not more opalescent than reference suspension II (2.2.1).

Loss of drying, at at 100 °C to 105 °C ( 2.2.32)

%

≤9

Sulphated Ash, at 600 ±  50 °C for 30 min(2.4.14)

%

≤0.1

Dextrins, gum, salts, sugars

To 2 ml of solution S, add 2 ml of alcohol R. The solution is clear. Add 1 ml of ether R. The solution remains clear for at least 10 min.

Resins

To 5 ml of solution S, add 5 ml of water R. The mixture remains clear for at least 15  min (2.2.1).

Arsenic

ppm

≤3

Heavy Metals (As Pb)

%

≤0.002

Microbial:

Total microbacterial count

cfu/g

<1,000

Total Yeast & Mold

cfu/g

<100

Salmonella

Negative

E.Coli

Negative