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 1999 · 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.
Need a different quantity or pack?
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.
Prices exclude VAT/sales tax and shipping.
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
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.