Molekula
2,3-Dihydroxybenzoic acid
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
2,3-Dihydroxybenzoic acid is an organic compound featuring two hydroxyl groups and a carboxyl group on adjacent benzene ring positions, primarily used as a building block in pharmaceutical synthesis, as a chelating agent, and in the production of UV absorbers and antioxidants. In the laboratory, it also serves as a matrix compound for MALDI mass spectrometry of synthetic polymers. It is a white to off-white crystalline powder with a CAS number of 303-38-8, molecular formula (HO)2C6H3CO2H, and molecular weight of 154.12 g/mol. Store at ambient conditions under dry conditions. The product carries a signal word of "Warning" per GHS classification. Molekula supplies 2,3-Dihydroxybenzoic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
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Specifications
| Property | Value |
|---|---|
| Appearance | Reddish Powder |
| Assay | >98% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 204 °C |
| Vapour Pressure | 0.0000021 mmHg |
| pKa | pKa = 2.91 (at 25 °C) |
Source: PubChem CID 19 (DrugBank, Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 47876359 |
| CAS Number | 303-38-8 |
| IUPAC Name | 2,3-dihydroxybenzoic acid |
| EC Number | 206-139-5 |
| Molecular Formula | (HO)2C6H3CO2H |
| Molecular Weight | 154.12 |
| Exact Mass | 154.0266 |
| SMILES | C1=CC(=C(C(=C1)O)O)C(=O)O |
| InChIKey | GLDQAMYCGOIJDV-UHFFFAOYSA-N |
| InChI | InChI=1S/C7H6O4/c8-5-3-1-2-4(6(5)9)7(10)11/h1-3,8-9H,(H,10,11) |
| PubChem CID | 19 |
| REACH Code | Y113 |
| HTS Code | 29182965 |
| Tariff Code | 2918290090 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 2-carboxy-6-hydroxybenzen-1-olate
- 2-Pyrocatechuic acid
- 2,3 DHB
- 3-Hydroxysalicylic acid
- Benzoic acid, 2,3-dihydroxy-
- Catecholcarboxylic acid
- DHBA
- DOBK
- o-Pyrocatechuic acid
- Pyrocatechuic acid
Frequently asked questions
What is 2,3-Dihydroxybenzoic acid commonly used for?
It is primarily used in organic synthesis, pharmaceutical intermediates, and as a building block for specialty chemicals like salicylates and polymers.
What is the molecular formula and molecular weight of 2,3-Dihydroxybenzoic acid?
The molecular formula is (HO)₂C₆H₃CO₂H, and the molecular weight is 154.12 g/mol.
How should 2,3-Dihydroxybenzoic acid be stored?
Store it at ambient temperature in a cool, dry place, away from incompatible substances and moisture.
What grades of purity are available for this product?
We typically supply it in high-purity grades (98%+), suitable for research, development, and industrial applications.
Can Molekula supply 2,3-Dihydroxybenzoic acid in bulk quantities?
Yes, we offer bulk quantities for large-scale applications—please contact our sales team for specific pricing and availability.
What documentation comes with an order of 2,3-Dihydroxybenzoic acid?
Each order includes a Certificate of Analysis (CoA), Safety Data Sheet (SDS), and a Material Safety Information (MSI) document.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.