3,4-DICARBOXYTHIOPHENE 3,4-THIOPHENEDICARBOXYLIC ACID 4282-29-5 AS06782 Thiophene-3,4-dicarboxylic acid CAS 4282-29-5
| CAS No. | 4282-29-5 |
| Molecular Formula | C6H4O4S |
| Molecular Weight | 172.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3,4-DICARBOXYTHIOPHENE 3,4-THIOPHENEDICARBOXYLIC ACID 4282-29-5 AS06782 Thiophene-3,4-dicarboxylic acid (CAS 4282-29-5) is a high-purity analytical reference standard with the molecular formula C6H4O4S and a molecular weight of 172.16 g/mol.
3,4-DICARBOXYTHIOPHENE 3,4-THIOPHENEDICARBOXYLIC ACID 4282-29-5 AS06782 Thiophene-3,4-dicarboxylic acid (C6H4O4S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C6H4O4S |
| Molecular Weight | 172.16 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Sulfur Atoms | 1 |
Recommended Standards
- 23945-50-8 5-Pyrimidinecarboxylic acid, 1,2,3,4-tetrahydro-4-oxo-2-thioxo- 1,2,3,4-Tetrahydro-4-oxo-2-thioxopyrimidine-5-carboxylic acid EINECS 245-948-8 2-Thiouracil-5-carboxylic acid (CAS 23945-50-8)
- Cefdinir Impurity 34 (CAS 73150-67-1)
- Thiophene-2,4-dicarboxylic acid (CAS 36157-39-8)
- Raltitrexed Impurity 5 (CAS 4282-31-9)
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- 9-(2,3-Dihydroxypropoxy)-9-oxononanoic acid (CAS 109421-77-4)
- 3-Amino-2-fluoropyridine-4-carboxamide (CAS 1804052-83-2)
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