Tannic Acid (Food grade .Technical grade .Pharma-grade)
Synonyms:Tannic acid, tannin,Chinese gallnut tannic acid,chinese Tannin
sources :root of Chinese gallnuts
CAS : 1401-55-4
Molecular weight :1434~1701.18
Property:It is faint yellow to brown powder with special smell, astringent. Dissolves in 1 portion water or ethyl alcohol, dissolves in acetone, does not dissolve in the chloroform or ether.
Appearance:Faint yellow powder
Tannic acid(dry base) 92%min
Residue on Ignition 0.20% max
Arsenic 3ppm
Heavy metals 20ppm max
gallic acid content 7% max
Total color 2 max
Main technical index:
|
No.
|
Index name/Kind
|
Industrial tannic acid
|
|
1
|
Tannin min
|
81
|
|
2
|
Insoluble substance max
|
0.6
|
|
3
|
Loss on drying max
|
9
|
|
4
|
Total colors max
|
2
|
Use:It is clarifying agent of Beer and low Grape wine,also used in pineapple proteinase.
Packing:Put in plastic bottle, 500k/bot. Paperboard packing for export, 25kg/drum
|