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Place of Origin
HS-CODE
30-
Package & Delivery Lead Time
Detailed Description
Product name: Tannic acid
Other name; Tannin acid, Tannin, Gallotannic acid
CAS NO:1401-55-4
M.F.: C76H52O46
M.W.:701.18
Assay: 99%min
Appearance:Light yellowish to brownish powder, soluble in 1 share Of water or ethanol; Soluble in acetone;
Almost insoluble in chloroform or diethyl ether. Synonym: Tannin, Gallotannic acid
1. Industrial grade
Item First-grade product
Loss on drying, %≤ : 9.0
Water insoluble, %≤ : 0.3
Solution color≤ : 2.0
Content(dry weight), ≥ : 81.0
Application: Widely used in extract of Ge, manufacture of "lro ink", anti-corrosion of metal, treatment of slurry in petroleum well, raw materials of pharmaceutical industry.
Package: In plastic woven bags of 25kg net each.
2. Electronicsl grade
Characteristic: Light yellowish to light brownish powder, soluble in 1 share of water or ethanol, soluble in acetone,
insoluble in chloroform or ethyl ether
Content of Tannic Acid (dry base), %: ≥ 99.5
Chloride, ppm: ≤ 4.4
Pb, ppm: ≤ 2.0
Fe, ppm: ≤ 2.0
Sulfate, ppm: ≤ 3.0
Moisture, % : ≤ 10.0
Application: Additive materials for fine chemistry and electronics field.
Storage: Airproof and protect from light
Package: Net weight 25kg per drum
3. Pharmaceutical grade
Appearance: Light yellowish to light brownish powder, soluble in 1 share of water or ethanol, soluble in acetone,
insoluble in chloroform or ethyl ether.
Content of tannic acid: ≥ 86.0%
Loss on drying: ≤ 9.0%
Water insoluble substance: ≤ 0.60%
Color: ≤ 1.0
Ignited residue: ≤ 0.20%
Gallic acid: ≤ 7.0
Application: Tannic acid for medicine has the antiseptic, enzyme-eliminating and convergent effects. Applied as antibiotics to treating tinea, eliminating toxic substances and
stopping diarrhea etc.
Package: 25kg/drum.
4. Food grade
Appearance: Light yellowish to light brownish powder, soluble in 1 share of water or ethanol, soluble in
acetone, insoluble in chloroform or ethyl ether.
Main specifications:
Appearance: Ivory, no odour
Heavy metal, %: ≤ 0.002
Loss on drying, %: ≤ 9.0
As, %: ≤ 0.0002
Ignited residue, %: ≤ 1.0
Content, %: ≥ 86
Application: Food and feed additive.
Package: 25kg/drum
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