Tannic Acid
【Other name】Tannic acid Gallnut Extract;Tannic Acid;Gallnut Extract Powder;Natural Tannic Acid
【Latin Name】: Galla Chinensis
【CAS No.】: 1401-55-4
【Molecular Formula】: C76H52O46
【Specification】: ≥99%
【Taste】： With special odor and extremely astringent taste
【Form】: Powder
【Color】: Yellow to light brown
【Solubility 】:ethanol: soluble100mg/mL
【Active Ingredient】Tannic acid
【Mesh】80 mesh
【Test Method】: HPLC
【Samples】:Free sample is available.
【MOQ】: 1KG.
【Packing】：Standard packing is 25kg/drum，or customized.
【Storage】：Store in a cool, dry place away from Light and Heat.
Premium Tannic Acid from Chinese Gallnut – Pharmaceutical & Food Grade
Tannic Acid is a high purity polyphenolic chemical derived from the galls of the sumac tree (Rhus chinensis) produced by natural aphid parasitism. Our product has excellent astringent, antioxidant and protein binding capabilities for medicinal, food and cosmetic applications. Our product is made from high-quality gallnuts collected from Sichuan, Guizhou and Hubei provinces and fulfills stringent international requirements. We stress traceability of raw materials. Galls at the belly stage contain 55-70% of natural tannin and are suitable for extraction of high purity. We eliminate heavy metals and pesticide residues, while maintaining bioactive integrity via regulated low temperature processing and multistage purification. From 85% food grade for wine clarity to 98% pharmaceutical grade for medication formulations, we guarantee quality and a dependable supply.
Technical Specifications
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Parameter |
Value |
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CAS Number |
1401-55-4 |
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Molecular Formula |
C₇₆H₅₂O₄₆ |
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Appearance |
Yellow to light brown powder |
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Purity |
≥93%, ≥98% (USP/BP) |
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Solubility |
Highly soluble in water, ethanol, propylene glycol |
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Mesh Size |
80 mesh |
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Test Method |
HPLC |
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Shelf Life |
24 months (sealed, cool, dark storage <60% humidity) |
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| Test Item | Standard Requirement | Test Result | Judgment |
|---|---|---|---|
| Appearance | Yellowish-white to light brown amorphous powder, slight characteristic odor | Light yellowish-brown amorphous powder | Complies |
| Identification | Chemical reaction consistent with tannic acid standard | Conforms to reference standard | Complies |
| Assay | ≥98.0% | 99.37% | Complies |
| Loss on Drying | ≤9.0% | 4.25% | Complies |
| Residue on Ignition | ≤0.20% | 0.07% | Complies |
| pH (1% aqueous solution) | 3.0 ~ 5.0 | 3.9 | Complies |
| Water Insoluble Matter | ≤0.50% | 0.13% | Complies |
| Particle Size | 100 mesh pass rate ≥98% | 99.5% | Complies |
| Solubility | Soluble in water, ethanol, acetone; insoluble in benzene, chloroform, ether | Conforms | Complies |
| Lead (Pb) | ≤2.0 ppm | 0.41 ppm | Complies |
| Arsenic (As) | ≤2.0 ppm | Not Detected | Complies |
| Cadmium (Cd) | ≤0.3 ppm | Not Detected | Complies |
| Mercury (Hg) | ≤0.1 ppm | Not Detected | Complies |
| Total Aerobic Microbial Count | ≤1000 CFU/g | 55 CFU/g | Complies |
| Yeast & Mold Count | ≤100 CFU/g | Not Detected | Complies |
| Escherichia coli | Negative / g | Negative | Complies |
| Salmonella spp. | Negative / 25g | Negative | Complies |
| Staphylococcus aureus | Negative / g | Negative | Complies |
Why Choose Shaanxi Rebecca Bio-Tech?
Raw Material Traceability: Full We obtain genuine gallnuts under GAP monitoring, and with stringent grading:
· Pharmaceutical/Food Grade: Whole, fresh galls, devoid of mold and contaminants, to achieve 93-98% purity
· Organic Grade: USDA/ECOCERT certified organic, pesticide free ecological cultivation
· Industrial Grade: Cost effective broken galls for leather and water treatment
Advanced Production Infrastructure: 3 dedicated lines with a processing volume of over 2,000 tons per year. Controlled temperature countercurrent hot water extraction (40-50℃ for food/pharma grades) is used to avoid oxidation and retain bioactivity.
State-of-the-Art Testing: We use UPLC, HPLC, ICP-MS and GC-MS technology to guarantee every batch satisfies criteria for purity, heavy metals and pesticide residues. We provide comprehensive analytical reports with COA, MSDS and Certificates of Origin.
ISO9001 HALAL KOSHER HACCP ISO22000 FSSC22000 Non-GMO Vegan Global Certifications.
Solubility & Stability Profile
Solubility: Very soluble in cold/hot water, ethanol and propylene glycol. Sparingly soluble in oils (emulsifiers required).
Stability Characteristics:
· Temperature: stable <75°C, no extended >90°C to prevent hydrolysis
· pH Range: Best 4.0-6.5; breaks down in harsh alkaline/acidic environment
· Metal Ions: Avoid interaction with iron (forms blue-black complex)
· Light: Avoid extensive exposure to light to avoid oxidation
· Storage: sealed, cold, dark area; <60% humidity
Production Process Overview
Pretreatment
Manual sorting → Permanent magnet removal → 40–60 mesh grinding → Enzymatic pretreatment (15–20% yield boost)
Extraction
Countercurrent hot water extraction (pH 5.0–6.5, 40–50℃) → 8-tank series → 3–4 stage processing
Purification
Multi-stage resin filtration → Solvent deep refining (pharmaceutical grade)
Drying & Packaging
Low-temperature spray drying → Quality testing → Sealed packaging
Critical Control Points: Iron-free 304 stainless steel equipment, low-temperature processing, pH monitoring, HPLC verification at each stage.
Quality Assurance
Testing Protocol: Independently evaluated for potency, purity heavy metals, pesticide residue and microbiological contamination.
Packaging
Packing of Tannic Acid: 1kg aluminum foil pouches, 25kg drums/cartons. Custom Packaging Is Available
Shipping: Air/sea freight with full set of customs documents (COA, MSDS, Certificate of Origin)
Frequently Asked Questions
Q: What's the difference between 85% and 98% grades?
A: 85% food grade, purified by single-stage resin, applicable to wine clarifying and food preservation. 98% pharma-grade employs ultra-low iron content multi-stage deep refining, suited for medicine formulation and high-end cosmetics.
Q: Will it remain stable in formulations?
A: Yes, provided the product is kept between pH 4.0-6.5 and <75℃. Avoid alkaline environments and iron containers to avoid staining and inactivation.
Q: Can you provide organic certification?
A: Yes, our organic-grade product is traceable with USDA and ECOCERT and is manufactured on separate lines from pesticide-free farming.
Q: Do you offer OEM/ODM services?
A: Oh, definitely. We tailor formulas, dosage forms (powder, pills, capsules) and packaging to your individual needs.
Contact Us
contact us today: information@sxrebecca.com to discuss your specific requirements for Tannic Acid.
