Thieno[2,3-b]furan-5-carboxylic acid CAS 934246-40-9
| CAS No. | 934246-40-9 |
| Molecular Formula | C7H4O3S |
| Molecular Weight | 168.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Thieno[2,3-b]furan-5-carboxylic acid.
Thieno[2,3-b]furan-5-carboxylic acid (CAS 934246-40-9), molecular formula C7H4O3S and molecular weight 168.17 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Thieno[2,3-b]furan-5-carboxylic acid (C7H4O3S) 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 168.17 g/mol, it falls into the medium-molecular-weight range. 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 | C7H4O3S |
| Molecular Weight | 168.17 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Sulfur Atoms | 1 |
Related Thieno Standards
- 1H-thieno[3,2-c]pyrazole-5-carboxylic acid (CAS 1313726-01-0)
- Thieno[3,2-b]furan-5-carboxylic acid (CAS 1334148-11-6)
- Thieno[2,3-b]pyrazine-2,3(1H,4H)-dione (CAS 149587-32-6)
- Thieno[3,2-d]pyrimidine-2,4(1H,3H)-dione (CAS 16233-51-5)
- 3H-Thieno[2,3-d]imidazole-5-carboxylic acid (CAS 193066-59-0)
- 1H-Thieno[3,4-d]pyrimidine-2,4-dione (CAS 6251-30-5)
- Thieno[2,3-d]pyrimidine-4-thiol (CAS 14080-55-8)
- thieno[3,2-d]pyrimidine-4-thiol (CAS 16229-24-6)
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- Methyl (2S,4S)-4-[2-(tert-butyl)phenoxy]-2-pyrrolidinecarboxylate hydrochloride (CAS 1354488-22-4)
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- D-Ser39-Tirzepatide (CAS CATO-CPTD788679)
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