3-Methylthieno[2,3-b]thiophene CAS 1723-34-8
| CAS No. | 1723-34-8 |
| Molecular Formula | C7H6S2 |
| Molecular Weight | 154.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to sulfur-containing functionality, an aromatic ring system, 3-Methylthieno[2,3-b]thiophene is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 154.25 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
3-Methylthieno[2,3-b]thiophene (CAS 1723-34-8), molecular formula C7H6S2 and molecular weight 154.25 g/mol, is a CATO reference standard with documented purity and traceability.
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.
As a certified reference material (CRM), 3-Methylthieno[2,3-b]thiophene meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C7H6S2 |
| Molecular Weight | 154.25 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 2 |
Related Methylthieno Standards
- 2-Methylthieno[3,2-b]thiophene (CAS 13393-75-4)
- 2-Methylthieno[2,3-b]thiophene (CAS 26238-22-2)
- 2-Methylthieno[2,3-d]thiazole (CAS 61612-02-0)
- 6-Methylthieno[2,3-d]pyrimidine (CAS 106691-22-9)
- 5-Methylthieno[2,3-d]pyrimidine (CAS 19673-87-1)
- 2-Methylthieno[2,3-d]pyrimidine (CAS 56844-01-0)
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- 4-Methylthieno[3,4-b]pyridine (CAS 109510-31-8)
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