5,6-Dihydro-4H-cyclopenta[b]thiophene CAS 5650-50-0
| CAS No. | 5650-50-0 |
| Molecular Formula | C7H8S |
| Molecular Weight | 124.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5,6-Dihydro-4H-cyclopenta[b]thiophene (CAS 5650-50-0) is a high-purity analytical reference standard with the molecular formula C7H8S and a molecular weight of 124.20 g/mol.
Owing to sulfur-containing functionality, an aromatic ring system, 5,6-Dihydro-4H-cyclopenta[b]thiophene is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 124.20 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C7H8S |
| Molecular Weight | 124.20 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Sulfur Atoms | 1 |
Related Dihydro Standards
- 6,8-Dihydro-5H-imidazo[5,1-c][1,4]oxazine (CAS 116937-07-6)
- 5,6-Dihydro-4H-cyclopenta[d]oxazol-2-amine (CAS 1196147-70-2)
- (S)-6,7-Dihydro-5H-pyrrolo[1,2-a]imidazol-6-ol (CAS 1219019-23-4)
- (R)-6,7-Dihydro-5H-pyrrolo[1,2-a]imidazol-7-ol (CAS 1221187-73-0)
- (S)-6,7-Dihydro-5H-pyrrolo[1,2-a]imidazol-7-ol (CAS 1221187-74-1)
- 6,7-Dihydro-2H-pyrrolo[1,2-a]imidazol-3(5H)-one (CAS 127725-83-1)
- 6,7-Dihydro-5H-pyrrolo[1,2-α]imidazol-6-ol (CAS 1378606-06-4)
- 5,6-Dihydro-4H-cyclopenta[c]isoxazol-6-amine (CAS 1417728-48-3)
Recommended Standards
- 4-Methyl-2-vinylthiophene (CAS 84548-65-2)
- Diethyl(difluoro)silane (CAS 358-06-5)
- 3-Cyclopropyl-thiophene (CAS 29576-51-0)
- N,N-Dimethylaniline-d3 (N-methyl-d3) (CAS 88889-00-3)
- 4-Amino-3-bromo-1H-indazole-6-carboxylic acid (CAS 885521-20-0)
- LC-SDA(NHS-LC-Diazirine) (succinimidyl 6-(4,4'-azipentanamido)hexanoate) (CAS 1435895-19-4)
- DL-phe-pna (CAS 14235-17-7)
- 4-Chloro-1-(4-((4-chlorophenyl)sulfonyl)piperazin-1-yl)butan-1-one (CAS 731815-63-7)
- 6-(3-Fluorophenyl)-3-pyridinamine (CAS 1214327-17-9)
- 3-(4-Methoxyphenyl)-3-methylbutan-2-ol (CAS 14614-79-0)
- 1-(4-Chlorobenzyl)-2-(6-chloropyridin-3-yl)-1H-benzo[d]imidazole (CAS 339112-50-4)
- 1-(Morpholinomethyl)cyclopropane-1-carboxylic acid (CAS 1257236-69-3)
- N-(3-Methoxy-4-(4-methyl-1H-imidazol-1-yl)phenyl)-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridin-2-amine trihydrochloride (CAS 1077629-16-3)
- D-Gln19-Tirzepatide (CAS CATO-CPTD788915)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com