Thiophene-3,4-dicarboxylic acid
- CAS No.
- 4282-29-5
- Chemical Name:
- Thiophene-3,4-dicarboxylic acid
- Synonyms
- 100G,500G,1KG,10KG;3,4-THIOPHENEDICARBOXYLIC ACID;EA129;DK7284;3,4-Dicarboxythiophene;THIOPHENE-3,4-DICARBOXY;THIOPHENE-3,4-DICARBOXYLATE;Thiophene-3,4-DicarboxylicAci;Thiophen-3,4-dicarboxylic acid;THIOPHENE-3,4-DICARBOXYLIC ACID
- CBNumber:
- CB7769265
- Molecular Formula:
- C6H4O4S
- Molecular Weight:
- 172.16
- MDL Number:
- MFCD00067079
- MOL File:
- 4282-29-5.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | 227-231 °C |
|---|---|
| Boiling point | 272.46°C (rough estimate) |
| Density | 1.473 (estimate) |
| refractive index | 1.5500 (estimate) |
| storage temp. | Keep in dark place,Sealed in dry,Room Temperature |
| solubility | soluble in Methanol |
| pka | 3.36±0.20(Predicted) |
| form | Crystalline Powder |
| color | Yellow to beige-pinkish or light brown |
| λmax | 240nm(H2O)(lit.) |
| InChI | InChI=1S/C6H4O4S/c7-5(8)3-1-11-2-4(3)6(9)10/h1-2H,(H,7,8)(H,9,10) |
| InChIKey | ZWWLLYJRPKYTDF-UHFFFAOYSA-N |
| SMILES | C1SC=C(C(O)=O)C=1C(O)=O |
| FDA UNII | J7P9TPY3Y5 |
| UNSPSC Code | 12352103 |
| NACRES | NA.23 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|---|---|
| Signal word | Warning |
| Hazard statements | H315-H319-H335 |
| Precautionary statements | P261-P271-P280 |
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 24/25 |
| WGK Germany | 3 |
| HazardClass | IRRITANT |
| HS Code | 29349990 |
| Storage Class | 11 - Combustible Solids |
Thiophene-3,4-dicarboxylic acid price More Price(61)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 795577 | 3,4-Thiophenedicarboxylic acid | 4282-29-5 | 5g | $124 | 2026-04-30 | Buy |
| TCI Chemical | T2280 | 3,4-Thiophenedicarboxylic Acid >98.0%(GC)(T) | 4282-29-5 | 1g | $64 | 2026-04-30 | Buy |
| AstaTech | 67066 | THIOPHENE-3,4-DICARBOXYLIC ACID 97% | 4282-29-5 | 5G | $27 | 2026-04-30 | Buy |
| Apolloscientific | OR2907 | Thiophene-3,4-dicarboxylic acid >97% | 4282-29-5 | 1g | $21 | 2026-06-04 | Buy |
| Apolloscientific | OR2907 | Thiophene-3,4-dicarboxylic acid >97% | 4282-29-5 | 5g | $33 | 2026-06-04 | Buy |
Thiophene-3,4-dicarboxylic acid Chemical Properties,Uses,Production
Chemical Properties
yellow to beige-pinkish or light brown crystalline
Uses
Thiophene-3,4-dicarboxylic Acid is used in preparation of dibromo thienofuran dione.
Uses
Synthetic precursor for organic electronics materials.
Synthesis
Thiophene-3,4-dicarbonitrile (13.4 g, 100 mmol) and KOH (56.1 g, 1 mol) were dissolved in ethylene glycol (167 ml), and heated under stirring overnight. The solution was cooled, put into distilled water, and washed with diethyl ether. The aqueous layer was oxidized with saturated hydrochloric acid, and organic materials were extracted with ethyl acetate. The organic layer was dried over MgSO and the4, solvent was evaporated Then, recrystallization was performed in distilled water to obtain thiophene-3,4-dicarboxylic acid (15.2 g, 88percent).
References
[1] Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1993, # 9, p. 1589 - 1596
[2] Patent: WO2008/127029, 2008, A1. Location in patent: Page/Page column 18
[3] Patent: US2010/99840, 2010, A1
[4] Journal of Heterocyclic Chemistry, 1986, vol. 23, p. 1103 - 1108
[5] Journal of the American Chemical Society, 2012, vol. 134, # 46, p. 19035 - 19042
Thiophene-3,4-dicarboxylic acid Preparation Products And Raw materials
Raw materials
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Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Zhengzhou AnMusi Chemical Products Co., Ltd. | 15981811963 18737195735 | 2370407954@qq.com | China | 1979 | 55 |
| Chongqing Xingcan Pharmaceutical Technology Co., Ltd. | 13594048950 19923294409 | xingcanyaoye@sina.com | China | 1591 | 58 |
| Hunan Caiya Biological Technology Co., Ltd | 15580017485 | 2036676503@qq.com | China | 91 | 58 |
| Henan Kehong Biological Technology Co. LTD | 0371-86658258 18638736641 | info@kehobio.com | China | 2767 | 58 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| Energy Chemical | 400-0056266 | sales8178@energy-chemical.com | China | 44850 | 61 |
| Wuhan Chemwish Technology Co., Ltd | 86-027-67849912 | sales@chemwish.com | China | 35884 | 56 |
| Capot Chemical Co., Ltd | +86 (0) 571 85 58 67 18 | China | 18187 | 66 | |
| Beijing Ouhe Technology Co., Ltd | 13552068683 13522913783 | 2355560935@qq.com | China | 11777 | 60 |
View Lastest Price from Thiophene-3,4-dicarboxylic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-02 | THIOPHENE-3,4-DICARBOXYLIC ACID
4282-29-5
|
$1.00-50.00 | 1KG | 99% | Henan Fengda Chemical Co., Ltd | ||
 |
2026-08-20 | THIOPHENE-3,4-DICARBOXYLIC ACID
4282-29-5
|
$1.10 | 1g | 99.00% | 100 Tons | Dideu Industries Group Limited | |
 |
2026-06-30 | Thiophene-3,4-dicarboxylic acid
4282-29-5
|
1kg | 99% | 10000KGS | Shaanxi Dideu New Materials Co. Ltd |
-
- THIOPHENE-3,4-DICARBOXYLIC ACID
4282-29-5
- $1.00-50.00
- 99%
- Henan Fengda Chemical Co., Ltd
-
- THIOPHENE-3,4-DICARBOXYLIC ACID
4282-29-5
- $1.10
- 99.00%
- Dideu Industries Group Limited
-
- Thiophene-3,4-dicarboxylic acid
4282-29-5
- $0.00
- 99%
- Shaanxi Dideu New Materials Co. Ltd
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