3,5-Dihydroxybenzoic acid
3,5-Dihydroxybenzoic acid (CAS: 99-10-5) is a dihydroxylated benzoic acid derivative with the linear formula (HO)2C6H3CO2H and a molecular weight of 154.12 g/mol. This organic compound serves as a valuable building block in organic synthesis and is frequently employed in the chemical industry. Its chemical structure makes it a useful intermediate for the production of more complex molecules, particularly in research and development settings.
- IUPAC
- α-Resorcylic acid
- Synonyms
- (HO)2C6H3CO2Hα-Resorcylic acid

Organic Synthesis Intermediate
3,5-Dihydroxybenzoic acid is a key intermediate in the synthesis of various organic compounds. Its reactive hydroxyl and carboxylic acid groups allow for diverse chemical transformations, making it useful in the development of novel molecules for research purposes.
Chemical Research and Development
Utilised in R&D laboratories, this compound facilitates the exploration of new chemical pathways and the creation of complex organic structures. Its well-defined structure makes it a reliable starting material for multistep syntheses.
Building Block for Specialty Chemicals
As a versatile building block, 3,5-Dihydroxybenzoic acid finds application in the creation of specialty chemicals. Its inclusion in synthetic routes can lead to compounds with specific desired properties for various industrial applications.
| Molecular weight | 154.12 |
|---|---|
| Linear formula | (HO)2C6H3CO2H |
| Assay | 97% |
| Melting point | 236-238 °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 |
|---|---|
| Flash point | 200 °C / 392 °F |
| Water hazard class (WGK, DE) | 1 |
| 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 3,5-Dihydroxybenzoic acid used for?
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3,5-Dihydroxybenzoic acid is primarily used as a building block and intermediate in organic synthesis and chemical research and development. It serves as a starting material for creating more complex organic molecules.
What is the CAS number and formula for 3,5-Dihydroxybenzoic acid?
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The CAS number for 3,5-Dihydroxybenzoic acid is 99-10-5, and its linear formula is (HO)2C6H3CO2H.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3,5-Dihydroxybenzoic acid with an assay of 97%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
What are the primary safety hazards associated with 3,5-Dihydroxybenzoic acid?
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3,5-Dihydroxybenzoic acid is classified with GHS07 symbol and a 'Warning' signal word. It causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask type N95, eyeshields, and gloves, should be used.
How is 3,5-Dihydroxybenzoic acid packed and exported?
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Tech Serve Solutions carefully packs and exports 3,5-Dihydroxybenzoic acid to meet international shipping standards, ensuring product integrity and compliance for global distribution.
How can I request a quote or sample of 3,5-Dihydroxybenzoic acid?
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To request a quote or a sample of 3,5-Dihydroxybenzoic acid, please visit the Tech Serve Solutions website or contact our sales department directly.
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