![Molecular structure of Thieno[2,3-b]pyrazine (CAS 56088-28-9)](/images/chem_structures_svg/392/56088-28-9.svg)
Thieno[2,3-b]pyrazine
Also known as: thieno<2,3-b>pyrazine, thieno<2,3-b>pyrazin, thienopyrazine
Thieno[2,3-b]pyrazine (CAS 56088-28-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H4N2S and a molecular weight of 136.174 g/mol. Key properties include a boiling point of 241.4±20.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 104.4±12.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 56088-28-9
- Jingsj CID
- J-1365783-5
- Molecular Formula
- C6H4N2S
- Molecular Weight
- 136.174 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 241.4±20.0 °C at 760 mmHg |
|---|---|
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 104.4±12.2 °C |
| Exact Mass | 136.009521 |
| PSA | 54.02000 |
| LogP | 2.23 |
| Vapor Pressure | 0.1±0.5 mmHg at 25°C |
| Refractive Index | 1.705 |
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 Thieno[2,3-b]pyrazine?
The CAS number of Thieno[2,3-b]pyrazine is 56088-28-9.
What are the molecular formula and molecular weight of Thieno[2,3-b]pyrazine?
Thieno[2,3-b]pyrazine has molecular formula C6H4N2S and molecular weight 136.174 g/mol.
What are the upstream and downstream products of Thieno[2,3-b]pyrazine?
For Thieno[2,3-b]pyrazine, Upstream Products: 2-Chloro-3-methylpyrazine, 2-Methyl-3-(methylthio)pyrazine, Ethyl 7-aminothieno[2,3-b]pyrazine-6-carboxylate; Downstream Products: 7-Chlorothieno[2,3-b]pyrazine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Thieno[2,3-b]pyrazine (CAS 56088-28-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1365783-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.