Thieno[2,3-b]thiophene-2-carboxylic acid CAS 14756-75-3
| CAS No. | 14756-75-3 |
| Molecular Formula | C7H4O2S2 |
| Molecular Weight | 184.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Thieno[2,3-b]thiophene-2-carboxylic acid (C7H4O2S2) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 184.24 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Thieno[2,3-b]thiophene-2-carboxylic acid (CAS 14756-75-3) is a high-purity analytical reference standard with the molecular formula C7H4O2S2 and a molecular weight of 184.24 g/mol.
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 | C7H4O2S2 |
| Molecular Weight | 184.24 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
| Sulfur Atoms | 2 |
Related Thieno Standards
- Thieno[3,4-b]thiophene-2-carboxylic Acid (CAS 14630-08-1)
- Thieno[3,2-b]thiophene-3-carboxylic acid (CAS 1467663-02-0)
- Thieno[3,2-β]thiophene-2-carboxylic Acid (CAS 1723-27-9)
- Thieno[3,2-d]isothiazole-5-carboxylic acid (CAS 74598-12-2)
- 4H-Thieno[3,2-b]pyrrole-5-carbonyl chloride (CAS 182553-05-5)
- Thieno[2,3-d][1,2,3]thiadiazole-6-carboxylic acid (CAS 192878-30-1)
- 1-{thieno[3,2-b]thiophen-2-yl}ethan-1-one (CAS 39131-69-6)
- Thieno[2,3-b]quinoxaline (CAS 54101-62-1)
Recommended Standards
- methyl 1H-pyrrolo[2,3-c]pyridine-5-carboxylate (CAS 147071-00-9)
- 2-Isopropyl-3,6-dimethoxy-2,5-dihydropyrazine (CAS 148403-14-9)
- 2-(Quinolin-4-yl)cyclopropan-1-amine (CAS 1493128-10-1)
- 2-(Quinolin-6-yl)cyclopropan-1-amine (CAS 1493758-36-3)
- 2-(2-Chloroacetamido)-3-(4-fluorophenyl)propanoic acid (CAS 67206-19-3)
- 6-Fluoro-1h-benzimidazole-2-carboxylic acid hydrate (CAS 1443425-13-5)
- [2-(1-methoxyethyl)-1,3-thiazol-4-yl]methanamine (CAS 1376269-88-3)
- 5-(((3-Fluorobenzyl)amino)methyl)pyrrolidin-2-one (CAS 1341736-67-1)
- (4-Bromo-2,3-dimethylphenyl)methanol (CAS 1785359-83-2)
- 1-(1,3-Dioxoisoindolin-2-yl) 4-methyl cubane-1,4-dicarboxylate (CAS 1993468-82-8)
- 2-Amino-6-(4-chlorophenyl)-4-(4-methoxyphenyl)-5-methylpyridine-3-carbonitrile (CAS 338794-64-2)
- (2-Bromo-5-fluorobenzyl)(3-chloro-5-fluorophenyl)sulfane (CAS 1443347-27-0)
- (2E,4Z)-2,4-Hexadien-1-ol (CAS 53384-66-0)
- Neuropeptide AF (human) (CAS 192387-38-5)
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