![Molecular structure of 5,6-Dihydro-4H-cyclopenta[b]thiophen-4-one (CAS 5650-51-1)](/images/chem_structures_svg/037/5650-51-1.svg)
5,6-Dihydro-4H-cyclopenta[b]thiophen-4-one
Also known as: 4H-Cyclopenta[b]thiophen-4-one, 5,6-dihydro-, 5,6-Dihydrocyclopenta[b]thiophen-4-one, AKOS BB-9698, 4H,5H,6H-cyclopenta[b]thiophen-4-one
5,6-Dihydro-4H-cyclopenta[b]thiophen-4-one (CAS 5650-51-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H6OS and a molecular weight of 138.187 g/mol. Key properties include a melting point of 115-117ºC, a boiling point of 239.6±9.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 98.7±18.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 5650-51-1
- Jingsj CID
- J-1498956-1
- Molecular Formula
- C7H6OS
- Molecular Weight
- 138.187 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 115-117ºC |
|---|---|
| Boiling Point | 239.6±9.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 98.7±18.7 °C |
| Exact Mass | 138.013931 |
| PSA | 45.31000 |
| LogP | 1.88 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.625 |
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 5,6-Dihydro-4H-cyclopenta[b]thiophen-4-one?
The CAS number of 5,6-Dihydro-4H-cyclopenta[b]thiophen-4-one is 5650-51-1.
What are the molecular formula and molecular weight of 5,6-Dihydro-4H-cyclopenta[b]thiophen-4-one?
5,6-Dihydro-4H-cyclopenta[b]thiophen-4-one has molecular formula C7H6OS and molecular weight 138.187 g/mol.
What are the upstream and downstream products of 5,6-Dihydro-4H-cyclopenta[b]thiophen-4-one?
For 5,6-Dihydro-4H-cyclopenta[b]thiophen-4-one, Upstream Products: N,N-Dimethylacrylamide, 3-Thiophenecarboxaldehyde, 3-(2-Thienyl)propanoic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5,6-Dihydro-4H-cyclopenta[b]thiophen-4-one (CAS 5650-51-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1498956-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.