Molekula
2,4-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
2,4-Dihydroxybenzoic acid is an organic compound featuring two hydroxyl groups and a carboxyl group on a benzene ring, widely used as a precursor in pharmaceuticals, preservatives, and UV absorbers. It also serves as an intermediate for dyestuffs, a flavouring agent, a MALDI matrix for synthetic polymer analysis, and a laboratory test reagent for iron. It appears as a white to off-white crystalline powder with a melting point of 214–218°C. Catalogue details: CAS 89-86-1, molecular formula C7H6O4, molecular weight 154.12 g/mol, requires ambient storage, and carries a Danger signal word because it causes serious eye damage. Molekula supplies 2,4-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.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Off white to yellowish crystal powder |
| Melting Point | 208 - 217℃ |
| Purity | ≥ 99.0% |
| Moisture | ≤ 1.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 218 - 219 °C |
| Boiling Point | 309 to 310 °C at 760 mmHg |
| Solubility (other solvents) | Soluble in hot water, organic solvents, oils |
| Vapour Pressure | 0.0000021 mmHg |
| pKa | pKa = 3.11 (at 25 °C) |
Source: PubChem CID 1491 (Human Metabolome Database (HMDB), Joint FAO/WHO Expert Committee on Food Additives (JECFA), Haz-Map, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 90028377 |
| CAS Number | 89-86-1 |
| IUPAC Name | 2,4-dihydroxybenzoic acid |
| EC Number | 201-946-9 |
| Molecular Formula | (HO)2C6H3CO2H |
| Molecular Weight | 154.12 |
| Exact Mass | 154.0266 |
| SMILES | C1=CC(=C(C=C1O)O)C(=O)O |
| InChIKey | UIAFKZKHHVMJGS-UHFFFAOYSA-N |
| InChI | InChI=1S/C7H6O4/c8-4-1-2-5(7(10)11)6(9)3-4/h1-3,8-9H,(H,10,11) |
| PubChem CID | 1491 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29182965 |
| Tariff Code | 2918290090 |
Safety & GHS
-
Corrosive
GHS05
-
Health Hazard
GHS07
Hazard statements
- H303 May be harmful if swallowed
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H318 Causes serious eye damage
- 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
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
- P337+313 If eye irritation persists get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
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
- 2,4-Resorcylic acid
- 4-Carboxyresorcinol
- 4-Hydroxysalicylic acid
- Benzoic acid, 2,4-dihydroxy-
- beta-Resorcinolic acid
- beta-Resorcylic acid
- Coupler 320
- FEMA NO. 3798
- p-Hydroxysalicylic acid
- RESORCYLIC ACID, BETA
Frequently asked questions
What is 2,4-Dihydroxybenzoic acid commonly used for?
It is primarily used as an intermediate in the synthesis of pharmaceuticals, agrochemicals, and as a precursor for UV absorbers and antioxidants in polymers.
What is the molecular formula and molecular weight of 2,4-Dihydroxybenzoic acid?
The molecular formula is (HO)₂C₆H₃CO₂H, and the molecular weight is 154.12 g/mol.
What safety classification does 2,4-Dihydroxybenzoic acid have?
The product is classified with the Signal Word: Danger, indicating it requires careful handling due to potential hazards.
How should 2,4-Dihydroxybenzoic acid be stored?
Store in a tightly sealed container at ambient temperature, away from moisture and direct sunlight.
Does Molekula supply 2,4-Dihydroxybenzoic acid in bulk quantities?
Yes, we offer bulk quantities of 2,4-Dihydroxybenzoic acid to meet large-scale production needs—contact us for specific packaging options.
What documentation is provided with an order of 2,4-Dihydroxybenzoic acid?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a batch-specific quality report.
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.