Gallic acid
Gallic acid (CAS: 149-91-7), also known as 3,4,5-Trihydroxybenzoic acid, is a phenolic acid with the molecular formula (HO)₃C₆H₂CO₂H and a molecular weight of 170.12 g/mol. It is a naturally occurring compound found in various plants, recognised for its antioxidant properties. Gallic acid is widely utilised as an intermediate in the synthesis of other chemicals, including pharmaceuticals and dyes, and finds application in analytical chemistry and laboratory research.
- IUPAC
- 3,4,5-Trihydroxybenzoic acid
- Synonyms
- 3,4,5-Trihydroxybenzoic acid

Chemical Synthesis Intermediate
Gallic acid serves as a key building block in the synthesis of various organic compounds. It is particularly important in the production of pyrogallol and certain pharmaceuticals and dyes due to its reactive phenolic hydroxyl groups.
Antioxidant Applications
As a potent antioxidant, Gallic acid helps neutralise free radicals. This property makes it valuable in research related to oxidative stress, cellular damage, and the development of chemopreventive agents.
Analytical Reagent
In laboratory settings, Gallic acid can be employed as a reagent in specific analytical procedures. Its distinct chemical properties allow for its use in certain titrations and qualitative tests.
Research and Development
Gallic acid is frequently used in academic and industrial research, particularly in fields like cell biology, cancer research, and phytochemistry, to investigate its biological activities and potential therapeutic effects.
| Molecular weight | 170.12 |
|---|---|
| Linear formula | (HO)3C6H2CO2H |
| Assay | 97.5-102.5% (titration) |
| Melting point | 251 °C (dec.)(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Gallic acid primarily used for?
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Gallic acid is primarily used as an intermediate in chemical synthesis, for its antioxidant properties in research, as an analytical reagent, and in various scientific research applications including cell biology and cancer research.
What is the CAS number and chemical formula for Gallic acid?
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The CAS number for Gallic acid is 149-91-7, and its linear chemical formula is (HO)₃C₆H₂CO₂H.
What grade and purity does Tech Serve Solutions supply for Gallic acid?
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Tech Serve Solutions supplies Gallic acid with an assay of 97.5-102.5% by titration. We do not represent this product as USP, BP, or EP grade unless explicitly stated.
How should Gallic acid be handled safely?
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Gallic acid is classified as an irritant. Handle with appropriate personal protective equipment, including a dust mask (N95), eyeshields, and gloves. Ensure adequate ventilation and avoid inhaling dust. Refer to the safety data sheet for full details.
Is Gallic acid a controlled substance?
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Based on the provided data, Gallic acid is not indicated as a controlled substance.
How is Gallic acid typically packed, shipped, and exported by TSS?
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Tech Serve Solutions professionally packs and ships chemicals globally, adhering to all necessary regulations for safe transport and export.
How can I request a sample or quote for Gallic acid?
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To request a sample or a quote for Gallic acid, please contact our sales team through the website or by phone.
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