TCS Industries Limited (China-sourced API supplier) supplies Gallic Acid — Plant Extract CAS 149-91-7 for pharmaceutical B2B procurement — COA, MSDS, and technical documentation available on request.
> Overview
| Product Name | Gallic Acid |
|---|---|
| Structural Formula |  |
| CAS Number | 149-91-7 |
| Molecular Formula | C7H6O5 |
| Molecular Weight | 170.12 g/mol |
| InChIKey | LNTHITQWFMADLM-UHFFFAOYSA-N |
| SMILES | Available on request where applicable |
| Appearance | White to pale yellow crystalline powder |
| Purity / Grade | By agreed specification and batch COA |
| Storage | Keep tightly closed in a cool, dry, well-ventilated place |
Gallic Acid (CAS 149-91-7) is a naturally occurring trihydroxybenzoic acid with the formula C₇H₆O₅ (MW 170.12). It is a polyphenol found in gallnuts, tea leaves, oak bark, and many fruits. Gallic acid is the monomeric building block of hydrolyzable tannins (gallotannins). It is used as an antioxidant in food and cosmetic applications, as a pharmaceutical intermediate, and as an analytical standard in polyphenol research.
TCS Industries Limited, a Hong Kong-based trading and sourcing company, supplies Gallic Acid in pharmaceutical, food, cosmetic and analytical grades for global procurement programs.
> Applications
Antioxidant and pharmaceutical intermediate
Gallic acid and its esters (propyl gallate E310, octyl gallate E311, dodecyl gallate E312) are used as antioxidants in food, pharmaceutical, and cosmetic formulations. Gallic acid is also a starting material for synthesis of trimethoprim and other pharmaceutical compounds. Its antioxidant activity is attributed to the three hydroxyl groups on the aromatic ring. Badhani et al. (RSC Adv, 2015, 5:27540–27557) reviewed the antioxidant mechanisms and structure-activity relationships of gallic acid and its derivatives.
Analytical standard and research reagent
Gallic acid is the primary reference standard for the Folin-Ciocalteu total phenolic content assay, which reports results as “gallic acid equivalents” (GAE). It is widely used in food science, oenology, and natural product research laboratories. Analytical-grade material requires high purity (≥98%) and controlled moisture content.
> Sourcing & Supply
TCS Industries Limited supports development, qualification and commercial purchasing discussions for Gallic Acid with buyers in Germany, France, Italy, Spain, the United Kingdom, the United States, Canada and Australia.
- Evaluation and commercial quantities: 1 kg samples for qualification; 25 kg drums for production. Pharmaceutical, food, cosmetic and analytical grades available.
- Pallet quantities and production campaigns: repeat supply is coordinated against packaging, lead time, annual demand and destination-market import requirements.
> Quality & Documentation
Key specification parameters include assay (≥98.0% by HPLC for pharmaceutical/analytical grade), moisture (≤1.0%), ash (≤0.1%), heavy metals (Pb ≤10 ppm, As ≤2 ppm), related substances (tannic acid, methyl gallate), and melting point (253–258 °C, decomposition). Identity confirmed by HPLC, IR spectrum, and characteristic white to pale yellow crystalline needles. COA and MSDS are standard.
> Packaging
Gallic Acid is stable under normal conditions but may darken upon prolonged exposure to air and light. Standard packaging includes 25 kg fibre drums with PE liner, or 25 kg cartons with inner PE bags. Store in a cool, dry, dark environment. Shelf life is typically 24–36 months. Labels and documents are checked before dispatch.
> Pricing & MOQ
Pricing is quoted by specification, packaging and destination. Common commercial discussions use 25 kg bag/drum formats, pallet quantities and production-campaign planning; smaller samples may be reviewed for qualified formulation teams.
> Regulatory & Compounding Context
Gallic Acid is listed in the FDA IID as a pharmaceutical excipient. Its esters (propyl gallate E310) are authorized food antioxidants in the EU (Regulation 1333/2008). Gallic acid itself is permitted in cosmetic products per EU Cosmetics Regulation 1223/2009 as an antioxidant ingredient. REACH-registered. Not classified as dangerous goods. Buyers should specify grade and application at inquiry.
> Alias Index
- IUPAC: 3,4,5-Trihydroxybenzoic acid
- CAS Number: 149-91-7
- Formula: C₇H₆O₅ (MW 170.12)
- Common names: Gallate, 3,4,5-Trihydroxybenzoate
- Related compounds: Propyl gallate (CAS 121-79-9, E310), Tannic acid (CAS 1401-55-4)
- InChIKey: LNTHITQWFMADLM-UHFFFAOYSA-N
- Commercial request terms: gallic acid pharma grade, 3,4,5-trihydroxybenzoic acid, polyphenol standard, antioxidant intermediate, TCS Industries Limited
> FAQ
What grades of Gallic Acid does TCS supply?
TCS sources pharmaceutical, food, cosmetic, and analytical (HPLC reference standard) grades. Assay ranges from ≥98.0% for pharma/analytical grade. Specify the intended application and purity requirement at inquiry.
What documents are available for Gallic Acid orders?
COA and MSDS are standard for commercial discussions. COO, packing list, invoice and other import-support documents can be arranged according to order scope.
Do you supply Gallic Acid to Germany, France and Spain?
Yes. We support B2B buyers in Germany, France, Italy, Spain, the United Kingdom, the Netherlands, Poland and Switzerland, subject to route and document review.
Do you supply the United States, Canada and Australia?
Yes. We review the United States, Canada, Australia and New Zealand for project supply, import documents, packaging and logistics planning before quotation.
What is the relationship between Gallic Acid and Tannic Acid?
Gallic acid (CAS 149-91-7, MW 170) is the monomer. Tannic acid (CAS 1401-55-4, MW ~1701) is a polymer of gallic acid esterified to a glucose core. Hydrolysis of tannic acid yields gallic acid and glucose. They are different compounds with different specifications and applications.
Is Gallic Acid used as a food antioxidant?
Gallic acid esters (propyl gallate E310, octyl gallate E311, dodecyl gallate E312) are authorized food antioxidants. Gallic acid itself is mainly used as a pharmaceutical/cosmetic ingredient and analytical reference standard. Specify whether gallic acid or its ester is required.
Can you arrange samples before commercial purchasing?
Samples or evaluation quantities may be reviewed for qualified buyers after target specification, application and destination-market requirements are clarified.
How is Gallic Acid packaged for export?
Packaging is confirmed by quantity and material properties. Typical options include foil bags, HDPE containers, fibre drums, 25 kg bags or palletized export packaging.
Can buyer-defined specifications be reviewed?
Yes. Send the specification, methods, impurity limits and required documents. TCS can review feasibility before confirming quotation and lead time.
What payment terms are normally used?
Standard payment is 100% T/T before dispatch unless a different arrangement has been approved for an established commercial account.
What lead time should buyers expect?
Lead time depends on stock, batch size, document scope and destination. Available stock can move faster; made-to-order or pallet programs require longer planning.
What is the Folin-Ciocalteu assay?
The Folin-Ciocalteu method is the standard colorimetric assay for total phenolic content. Results are expressed as gallic acid equivalents (mg GAE/g). Gallic acid is the primary calibration standard. Analytical-grade gallic acid (≥98%, low moisture) is required for accurate calibration curves.
Last reviewed: June 2026
Evaluation and research orders (≤10 kg) are shipped with COA, MSDS, and certificate of origin. Bulk commercial orders (>10 kg) qualify for volume pricing with a full technical documentation package available on request.
> Request a Quote
If your team already has a target application, estimated quantity, destination market, or documentation requirements, send those details so the commercial response can be prepared more efficiently.