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CAS NO.1401-55-4
High quality 1401-55-4
Tannic acid
Synonym: Tannin, Gallotannic acid
Molecular formula and weight: C76H52O46 = 701.18
CAS registry number: 1401-55-4
Grades: tech grade,
food grade (wine),
pharmaceutical grade (BP standard)
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
2. Electronicsl grade
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
3. Pharmaceutical grade
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
4. Food grade
Main specifications:
Appearance: Ivory, no odour
Heavy metal, %: ≤ 0.002
Loss on drying, %: ≤ 9.0
As, %: ≤ 0.0002
Ignited residue, %: ≤ 1.0
Content, %: ≥ 86