3-Methylthieno[3,2-b]thiophene-2-carboxylic acid CAS 1901-41-3
| CAS No. | 1901-41-3 |
| Molecular Formula | C8H6O2S2 |
| Molecular Weight | 198.26 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 3-Methylthieno[3,2-b]thiophene-2-carboxylic acid.
3-Methylthieno[3,2-b]thiophene-2-carboxylic acid (CAS 1901-41-3) is a high-purity analytical reference standard with the molecular formula C8H6O2S2 and a molecular weight of 198.26 g/mol.
Structurally, 3-Methylthieno[3,2-b]thiophene-2-carboxylic acid (C8H6O2S2) 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 198.26 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.
As a certified reference material (CRM), 3-Methylthieno[3,2-b]thiophene-2-carboxylic acid 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 | C8H6O2S2 |
| Molecular Weight | 198.26 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 Methylthieno Standards
- 5-Methylthieno[3,2-b]thiophene-2-carboxylic acid (CAS 70060-21-8)
- 3-Methylthieno[2,3-c]isothiazole-5-carboxylic acid (CAS 82000-58-6)
- 5-methylthieno[2,3-c]isoquinoline (CAS 1558046-65-3)
- 5-methylthieno[3,2-c]isoquinoline (CAS 894102-32-0)
- 6-methylthieno[2,3-b]pyridine-2-carboxylic acid (CAS 193400-55-4)
- 5-methylthieno[2,3-b]pyridine-2-carboxylic acid (CAS 193400-56-5)
- 3-methylthieno[2,3-c]pyridine-7-carboxylic acid (CAS 2306272-59-1)
- 5-Ethyl-6-methylthieno[2,3-d]pyrimidin-4-ol (CAS 439692-89-4)
Recommended Standards
- methyl 3-methylimidazo[1,5-a]pyridine-7-carboxylate (CAS 1892799-57-3)
- rac-(2R,3S)-2-(piperidin-4-yl)oxolane-3-carboxamide (CAS 1909293-65-7)
- Ethyl 4-Oxo-2-nonenoate (CAS 18812-29-8)
- methyl 6-(aminomethyl)-2-azabicyclo[2.2.2]octane-2-carboxylate (CAS 1909320-26-8)
- 2,5-Dibromo-4-ethoxypyridine (CAS 52311-22-5)
- 4-(2-Chloro-6-fluorophenyl)-1-methyl-1h-pyrazol-5-amine (CAS 1248079-27-7)
- 2-{5,7-dimethyl-2-oxo-1h,2h-pyrazolo[1,5-a]pyrimidin-6-yl}acetic acid (CAS 1258639-52-9)
- 1398AF 5,7-Dimethyl-pyrazolo[1,5-a]pyrimidine-3-carbaldehyde 878414-63-2 C9H9N3O (CAS 878414-63-2)
- Omeprazole Impurity 54 (CAS 187222-18-0)
- oxyfenamate (CAS 50-19-1)
- 3-Tert-butyl-1,2,3,4-tetrahydroquinoline (CAS 1344085-17-1)
- 2-Chloro-N-methylacridin-9-amine (CAS 61981-66-6)
- 9-Fluoro-6-methyl-1,2,3,4-tetrahydrobenzo[b][1,6]naphthyridin-10(5H)-one (CAS 1355175-23-3)
- Eledoisin Related Peptide (CAS 2990-43-4)
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