3,3'-Dimethoxy-2,2'-bithiophene CAS 118583-86-1
| CAS No. | 118583-86-1 |
| Molecular Formula | C10H10O2S2 |
| Molecular Weight | 226.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3,3'-Dimethoxy-2,2'-bithiophene (CAS 118583-86-1), molecular formula C10H10O2S2 and molecular weight 226.32 g/mol, is a CATO reference standard with documented purity and traceability.
3,3'-Dimethoxy-2,2'-bithiophene (C10H10O2S2) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C10H10O2S2 |
| Molecular Weight | 226.32 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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.) | 1990 |
| Sulfur Atoms | 2 |
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Recommended Standards
- n-Ethyl-N-(pyrrolidin-3-yl)tetrahydro-2h-pyran-4-carboxamide (CAS 1183676-98-3)
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- 3-(Ethylthio)-5-(thiophen-2-yl)-4h-1,2,4-triazol-4-amine (CAS 118158-92-2)
- tert-Butyl 4-aminohexahydrocyclopenta[c]pyrrole-2(1H)-carboxylate (CAS 1187930-92-2)
- 2-(Pyridin-4-yl)-1,3-thiazolidine-4-carboxylic acid, mixture of diastereomers (CAS 51226-84-7)
- 4-(Bromomethyl)-3-nitroquinoline (CAS 79965-63-2)
- Ethyl 2-amino-3,6-difluorobenzoate (CAS 1183263-18-4)
- Nicametate (CAS 3099-52-3)
- 5,5'-(1,4-Phenylenebis(oxy))dipentanenitrile (CAS 47096-71-9)
- 1-(4-Fluoro-2,6-dimethylphenyl)ethanone (CAS 114820-12-1)
- N-(piperidin-4-yl)pyridin-3-amine hydrochloride (CAS 1240529-58-1)
- 1-(1-(Difluoromethyl)-1H-pyrazol-5-yl)-N-((tetrahydrofuran-2-yl)methyl)methanamine hydrochloride (CAS 1856098-39-9)
- 2-(Chloromethyl)-4-methoxythieno[3,2-d]pyrimidine (CAS 1421311-90-1)
- Semaglutide Impurity 144 (CAS 394210-59-4)
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