![Molecular structure of 5-phenyl-3H-thieno[2,3-d]pyrimidin-4-one (CAS 35978-39-3)](/images/chem_structures_svg/261/35978-39-3.svg)
5-phenyl-3H-thieno[2,3-d]pyrimidin-4-one
Also known as: 5-phenylthieno[2,3-d]pyrimidin-4(3H)-one, 5-phenylthieno[2,3-d]pyrimidin-4(1H)-one, 5-phenyl-3H,4H-thieno[2,3-d]pyrimidin-4-one, 7-phenyl-9-thia-2,4-diazabicyclo[4.3.0]nona-2,7,10-trien-5-one, thieno[2,3-d]pyrimidin-4(1H)-one, 5-phenyl-, 5-phenylthieno[2,3-d]pyrimidin-4(3H)
5-phenyl-3H-thieno[2,3-d]pyrimidin-4-one (CAS 35978-39-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C12H8N2OS and a molecular weight of 228.27000 g/mol. Key properties include a melting point of 216℃ (methanol ), a boiling point of 460.4ºC at 760mmHg, a density of 1.41g/cm3 and a flash point of 232.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 35978-39-3
- Jingsj CID
- J-29356-1
- Molecular Formula
- C12H8N2OS
- Molecular Weight
- 228.27000 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 216℃ (methanol ) |
|---|---|
| Boiling Point | 460.4ºC at 760mmHg |
| Density | 1.41g/cm3 |
| Flash Point | 232.3ºC |
| Exact Mass | 228.03600 |
| PSA | 74.25000 |
| LogP | 3.06390 |
| Refractive Index | 1.737 |
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-phenyl-3H-thieno[2,3-d]pyrimidin-4-one?
The CAS number of 5-phenyl-3H-thieno[2,3-d]pyrimidin-4-one is 35978-39-3.
What are the molecular formula and molecular weight of 5-phenyl-3H-thieno[2,3-d]pyrimidin-4-one?
5-phenyl-3H-thieno[2,3-d]pyrimidin-4-one has molecular formula C12H8N2OS and molecular weight 228.27000 g/mol.
What are the upstream and downstream products of 5-phenyl-3H-thieno[2,3-d]pyrimidin-4-one?
For 5-phenyl-3H-thieno[2,3-d]pyrimidin-4-one, Upstream Products: Ethyl 2-amino-4-phenylthiophene-3-carboxylate, Methanimidic acid, (Z)-; Downstream Products: 4-chloro-5-phenylthieno[2,3-d]pyrimidine.
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-phenyl-3H-thieno[2,3-d]pyrimidin-4-one (CAS 35978-39-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29356-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.