Thieno[3,2-β]thiophene-2-carboxylic Acid CAS 1723-27-9
| CAS No. | 1723-27-9 |
| Molecular Formula | C7H4O2S2 |
| Molecular Weight | 184.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Thieno[3,2-β]thiophene-2-carboxylic Acid (CAS 1723-27-9) is a high-purity analytical reference standard with the molecular formula C7H4O2S2 and a molecular weight of 184.24 g/mol.
Based on its molecular formula C7H4O2S2, Thieno[3,2-β]thiophene-2-carboxylic Acid contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 184.24 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | 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.) | 1957 |
| Sulfur Atoms | 2 |
Related Thieno Standards
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- Thieno[3,2-b]thiophene-3-carboxylic acid (CAS 1467663-02-0)
- Thieno[2,3-b]thiophene-2-carboxylic acid (CAS 14756-75-3)
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- 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
- 1-methyl-1H-pyrrolo[2,3-b]pyridine-3-carboxylic acid (CAS 171919-37-2)
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- Methyl 2-(1,4-diazabicyclo[2.2.2]Octan-2-yl)acetate (CAS 171351-26-1)
- 3-Propyl-1H-indole-5-carbonitrile (CAS 17380-30-2)
- 1-(But-3-yn-1-yl)-4-methylpiperidine (CAS 1343816-79-4)
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- 6-Phenyl-2-(prop-1-en-2-yl)-6,7-dihydrobenzo[d]oxazol-4(5H)-one (CAS 833446-79-0)
- 1,1,1,2,2-Pentafluoro-4-iodobutane (CAS 40723-80-6)
- 3,8-Dibromo-6-chloroimidazo[1,2-a]pyridine (CAS 1072944-57-0)
- tert-butyl cis-N-[4-(spiro[3.3]heptan-2-ylamino)cyclohexyl]carbamate (CAS 2277444-51-4)
- N'-(4,7-Dimethoxybenzo[d]thiazol-2-yl)propionohydrazide (CAS 851988-10-8)
- 3-(Dimethylamino)-4,4,4-trifluorobutanoic acid (CAS 1263281-69-1)
- 5-Bromo-6-fluoro-1-isopropyl-1,2,3-benzotriazole (CAS 1345471-93-3)
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