2,5-Dihydroxybenzoic acid
- CAS No.
- 490-79-9
- Chemical Name:
- 2,5-Dihydroxybenzoic acid
- Synonyms
- GENTISIC ACID;DHB;Gentisate;Gentisic;2,5-Dhba;Phloretate;Gensigen;2,5-dihydroxybenzoic;2,5-Dihydroxybenzoes?ure;Kyselina 2,5-dihydroxybenzoova
- CBNumber:
- CB5853669
- Molecular Formula:
- C7H6O4
- Molecular Weight:
- 154.12
- MDL Number:
- MFCD00002460
- MOL File:
- 490-79-9.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Product description | Number | Pack Size | Price |
| 2,5-Dihydroxybenzoic acid matrix substance for MALDI-MS, >99.0% (HPLC) | 85707 | 10mg | $23.4 |
| 2,5-Dihydroxybenzoic acid matrix substance for MALDI-MS, >99.0% (HPLC) | 85707 | 250mg | $311 |
| 2,5-Dihydroxybenzoic acid certified reference material, pharmaceutical secondary standard | PHR3329 | 50MG | $882 |
| 2,5-Dihydroxybenzoic acid matrix substance for MALDI-MS, >99.0% (HPLC) | 85707 | 1g | $1000 |
| 2,5-Dihydroxybenzoic acid 98% | 149357 | 10g | $50.2 |
| More product size | |||
| Melting point | 204-208 °C(lit.) |
|---|---|
| Boiling point | 237.46°C (rough estimate) |
| Density | 1.3725 (rough estimate) |
| refractive index | 1.6400 (estimate) |
| storage temp. | Store below +30°C. |
| solubility | It is soluble in alcohol and ether. |
| pka | 2.97(at 25℃) |
| form | Crystalline Powder |
| color | White to light beige |
| PH | 3.21(1 mM solution);2.56(10 mM solution);2.01(100 mM solution) |
| Water Solubility | soluble |
| ε(extinction coefficient) | >2000 at 337nm |
| Merck | 14,4398 |
| BRN | 2209119 |
| Cosmetics Ingredients Functions | SKIN CONDITIONING |
| InChI | 1S/C7H6O4/c8-4-1-2-6(9)5(3-4)7(10)11/h1-3,8-9H,(H,10,11) |
| InChIKey | WXTMDXOMEHJXQO-UHFFFAOYSA-N |
| SMILES | OC(=O)c1cc(O)ccc1O |
| LogP | 1.740 |
| CAS DataBase Reference | 490-79-9(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | VP36V95O3T |
| NIST Chemistry Reference | 2,5-Dihydroxybenzoic acid(490-79-9) |
| EPA Substance Registry System | Benzoic acid, 2,5-dihydroxy- (490-79-9) |
| UNSPSC Code | 77101502 |
| NACRES | NA.24 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H302 | |||||||||
| Precautionary statements | P264-P270-P301+P312-P501 | |||||||||
| PPE | dust mask type N95 (US), Eyeshields, Gloves | |||||||||
| Hazard Codes | Xn,Xi | |||||||||
| Risk Statements | 22-36/37/38 | |||||||||
| Safety Statements | 26-36-37/39 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | LY3850000 | |||||||||
| Hazard Note | Harmful | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 29182990 | |||||||||
| Storage Class | 11 - Combustible Solids | |||||||||
| Hazard Classifications | Acute Tox. 4 Oral | |||||||||
| NFPA 704 |
|
2,5-Dihydroxybenzoic acid price More Price(126)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 85707 | 2,5-Dihydroxybenzoic acid matrix substance for MALDI-MS, >99.0% (HPLC) | 490-79-9 | 10mg | $23.4 | 2026-04-30 | Buy |
| Sigma-Aldrich | 85707 | 2,5-Dihydroxybenzoic acid matrix substance for MALDI-MS, >99.0% (HPLC) | 490-79-9 | 250mg | $311 | 2026-04-30 | Buy |
| Sigma-Aldrich | PHR3329 | 2,5-Dihydroxybenzoic acid certified reference material, pharmaceutical secondary standard | 490-79-9 | 50MG | $882 | 2026-04-30 | Buy |
| Sigma-Aldrich | 85707 | 2,5-Dihydroxybenzoic acid matrix substance for MALDI-MS, >99.0% (HPLC) | 490-79-9 | 1g | $1000 | 2026-04-30 | Buy |
| Sigma-Aldrich | 149357 | 2,5-Dihydroxybenzoic acid 98% | 490-79-9 | 10g | $50.2 | 2026-04-30 | Buy |
2,5-Dihydroxybenzoic acid Chemical Properties,Uses,Production
Description
Gentisic acid is a dihydroxy benzoic acid. It is a derivative of benzoic acid and a minor (1 %) product of the metabolic break down of aspirin, excreted by the kidneys.
It is also found in the African tree Alchornea cordifolia and in wine.
Description
Gentisic acid is a benzoic acid that has been found in Gentiana and an active metabolite of aspirin with diverse biological activities. It decreases radiation-induced production of thiobarbituric acid reactive substances (TBARS), hydrogen peroxide, and protein carbonyls, increases superoxide dismutase activity, and prevents hemolysis in isolated human erythrocytes when used at concentrations ranging from 5 to 100 μM. Gentisic acid (1-10 μM) inhibits LDL oxidation and formation of cholesterol ester hydroperoxides in isolated human plasma. It induces relaxation of isolated guinea pig trachea (EC50 = 20 μM), an effect that is reduced by the large-conductance calcium-activated potassium channel blocker charybdotoxin . Gentisic acid (10 and 100 mg/kg) reduces cardiac hypertrophy and fibrosis and pulmonary remodeling, suppresses the renin-angiotensin-aldosterone system, and inhibits cardiac dysfunction in a mouse model of transverse aortic constriction-induced cardiac hypertrophy. It also prevents cardiovascular collapse and lactic acidemia in a canine model of P. aeruginosa-induced septic shock.
Chemical Properties
White to light beige crystalline powder. 2,5-Dihydroxybenzoic Acid [490-79-9] (gentisic acid, 2,5-DHBA), C7H6O4, Mr 154.1, mp 205 C, is soluble in water and alcohols but insoluble in benzene and chloroform. The acid is stable in boiling water and gives a deep blue color with iron(III) chloride. Here, the acid decomposes to form p-benzoquinone [106-51-4] and carbon dioxide. 2–5-Dihydroxybenzoic acid is used as an antirheumatic drug and, more recently, as a color developer for thermal paper.
Uses
Medicine, as sodium gentisate (analgesic).
Uses
2,5-dihydroxybenzoic acid areused as intermediates for pharmaceuticals (especially for antipyetic anlgesic, antirheumatism) and other organic synthesis. They are used as matrix for ionization of peptides, proteins and carbohydrates. In industrial field, they areused as intermediates for the production of other organic chemicals, resins, polyesters, plasticizers, dyestuffs, preservatives, and rubber chemicals.
Definition
ChEBI: 2,5-dihydroxybenzoic acid is a dihydroxybenzoic acid having the two hydroxy groups at the 2- and 5-positions. It has a role as a MALDI matrix material, an EC 1.13.11.33 (arachidonate 15-lipoxygenase) inhibitor, a human metabolite, a fungal metabolite and a mouse metabolite. It is functionally related to a benzoic acid. It is a conjugate acid of a 2,5-dihydroxybenzoate.
Production Methods
Gentisic acid is produced by carboxylation of hydroquinone.
C6H4(OH)2 + CO2 → C6H3(CO2H)(OH)2
This conversion is an example of a Kolbe–Schmitt reaction.
Application
As a hydroquinone , gentisic acid is readily oxidized and is used as an antioxidant excipient in some pharmaceutical preparations. In the laboratory, it is used as a sample matrix in matrix-assisted laser desorption/ionization (MALDI) mass spectrometry , and has been shown to conveniently detect peptides incorporating the boronic acid moiety by MALDI .
Synthesis Reference(s)
Journal of the American Chemical Society, 72, p. 3292, 1950 DOI: 10.1021/ja01163a521
General Description
Aspirin metabolite.
Safety Profile
Poison bp intravenous route. Moderately toxic by ingestion and intraperitoneal routes. Experimental teratogenic and reproductive effects. Mutation data reported. When heated to decomposition it emits acrid smoke and irritating fumes.
Purification Methods
Crystallise gentisic acid from hot water or *benzene/acetone. Dry it in a vacuum desiccator over silica gel. [Beilstein 10 H 384, 10 IV 1441.]
References
[1] RAVI JOSHI. Antioxidant activity and free radical scavenging reactions of gentisic acid: in-vitro and pulse radiolysis studies.[J]. Free Radical Research, 2012, 46 1: 11-20. DOI: 10.3109/10715762.2011.633518
[2] KEIKO ASHIDATE . Gentisic acid, an aspirin metabolite, inhibits oxidation of low-density lipoprotein and the formation of cholesterol ester hydroperoxides in human plasma[J]. European journal of pharmacology, 2005, 513 3: Pages 173-179. DOI: 10.1016/j.ejphar.2005.03.012
[3] J. F. CUNHA. The mechanism of gentisic acid-induced relaxation of the guinea pig isolated trachea: the role of potassium channels and vasoactive intestinal peptide receptors.[J]. Brazilian Journal of Medical and Biological Research, 2001, 4 1: 381-388. DOI: 10.1590/s0100-879x2001000300013
[4] SIMEI SUN. Gentisic acid prevents the transition from pressure overload-induced cardiac hypertrophy to heart failure.[J]. Scientific Reports, 2019: 3018. DOI: 10.1038/s41598-019-39423-8
[5] STEVEN MINK. Gentisic acid sodium salt, a phenolic compound, is superior to norepinephrine in reversing cardiovascular collapse, hepatic mitochondrial dysfunction and lactic acidemia in Pseudomonas aeruginosa septic shock in dogs.[J]. Intensive Care Medicine Experimental, 2016, 4 1: 24. DOI: 10.1186/s40635-016-0095-0
2,5-Dihydroxybenzoic acid Preparation Products And Raw materials
Raw materials
Preparation Products
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| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Shandong Vital Biotechnology Co., Ltd. | +8617860230571 | biotechcaroline@gmail.com | China | 87 | 58 |
| Hebei Chuanghai Biotechnology Co., Ltd | +8615350571055 | Sibel@chuanghaibio.com | China | 8738 | 58 |
| Hebei Yanxi Chemical Co., Ltd. | +8618531123677 | faithe@yan-xi.com | China | 5853 | 58 |
| Hebei Chuanghai Biotechnology Co,.LTD | +86-86-13131129325 +8613131129325 | sales1@chuanghaibio.com | China | 5220 | 58 |
| Hebei Fengjia New Material Co., Ltd | +86-0311-87836622 +86-18712993135 | sales01@tairunfaz.com | China | 8051 | 58 |
| Anhui Ruihan Technology Co., Ltd | +8617756083858 | daisy@anhuiruihan.com | China | 973 | 58 |
| HANGZHOU HAILAN CHEMICAL CO.,LTD. | +86-57156122185 +86-15967590394 | sales@hailan-chem.com | China | 3000 | 58 |
| Ningbo Qingteng Plastic Cost.,Ltd. | +86-19322619905; +8619322619905 | admin@nbqingteng.com | China | 342 | 58 |
| Capot Chemical Co.,Ltd. | +86-（0）57185586718 +86-13336195806 | sales@capot.com | China | 29640 | 60 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21585 | 55 |
Related Qustion
Ask a questionView Lastest Price from 2,5-Dihydroxybenzoic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
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2026-07-17 | 2,5-Dihydroxybenzoic acid
490-79-9
|
1kg | 99%min | 2000KGS | HANGZHOU HAILAN CHEMICAL CO.,LTD. | ||
 |
2026-07-17 | DHB
490-79-9
|
$10.00 | 1box | 99.99% | 9999 | Ningbo Qingteng Plastic Cost.,Ltd. | |
 |
2026-06-30 | 2,5-Dihydroxybenzoic acid
490-79-9
|
1kg | 99% | 10000KGS | Shaanxi Dideu New Materials Co. Ltd |
-
- 2,5-Dihydroxybenzoic acid
490-79-9
- $0.00
- 99%min
- HANGZHOU HAILAN CHEMICAL CO.,LTD.
-
- DHB
490-79-9
- $10.00
- 99.99%
- Ningbo Qingteng Plastic Cost.,Ltd.
-
- 2,5-Dihydroxybenzoic acid
490-79-9
- $0.00
- 99%
- Shaanxi Dideu New Materials Co. Ltd
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