Thieno[2,3-b]thiophene-2-carbaldehyde CAS 31486-85-8
| CAS No. | 31486-85-8 |
| Molecular Formula | C7H4OS2 |
| Molecular Weight | 168.24 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]thiophene-2-carbaldehyde.
Thieno[2,3-b]thiophene-2-carbaldehyde (CAS 31486-85-8), molecular formula C7H4OS2 and molecular weight 168.24 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of Thieno[2,3-b]thiophene-2-carbaldehyde (C7H4OS2) is characterized by sulfur-containing functionality, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C7H4OS2 |
| Molecular Weight | 168.24 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | 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.) | 1965 |
| Sulfur Atoms | 2 |
Related Thieno Standards
- Thieno[2,3-d]pyrimidine-4-thiol (CAS 14080-55-8)
- thieno[3,2-d]pyrimidine-4-thiol (CAS 16229-24-6)
- Thieno[3,2-b]thiophene-2-carbaldehyde (CAS 31486-86-9)
- thieno[3,2-b]pyridine-6-carbonitrile (CAS 116538-95-5)
- thieno[2,3-b]pyridine-5-carbonitrile (CAS 21344-31-0)
- 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)
Recommended Standards
- Thiazolo[5,4-b]pyridine-2-thiol (CAS 57135-09-8)
- Thiazole Impurity 3 (CAS 19960-72-6)
- 19805-75-5 2,2,5,5-Tetramethyl-3-pyrroline-3-carboxamide 2,5-Dihydro-2,2,5,5-tetramethyl-1H-pyrrole-3-carboxamide 3-Aminocarbonyl-2,2,5,5-tetramethyl-3-pyrroline 3-Carbamoyl-2,2,5,5-tetramethyl-3-pyrroline (CAS 19805-75-5)
- quinazoline-4-carbaldehyde (CAS 933747-26-3)
- Guanosine-5-O-(1-thiotriphosphate) (CAS 81570-50-5)
- 2-(((Benzyloxy)carbonyl)amino)-3-cyclopropylpropanoic acid (CAS 1260642-92-9)
- 1-methyl-decahydro-1,6-naphthyridine (CAS 933733-46-1)
- 6-Methyl-3-phenylquinolin-2-ol (CAS 73108-78-8)
- Dipivefrine EP Impurity A (CAS 329-65-7)
- N-(4-Aminophenyl)-2-(2-chlorophenoxy)acetamide (CAS 953886-54-9)
- Milrinone impurity 39 (CAS CATO-C4X-109139)
- 2-((3-Nitrophenyl)amino)benzoic acid (CAS 27693-70-5)
- 3-(5-Cyclobutyl-1,2,4-oxadiazol-3-yl)aniline (CAS 1154708-38-9)
- Insulin Degludec Impurity 2 (CAS CATO-C4X-21572)
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