![Molecular structure of Thieno[2,3-d]pyrimidin-4(3H)-one (CAS 14080-50-3)](/images/chem_structures_svg/013/14080-50-3.svg)
Thieno[2,3-d]pyrimidin-4(3H)-one
Also known as: 3,4-Dihydro-4-oxothieno[2,3-d]pyrimidine, 3H-thieno[2,3-d]pyrimidin-4-one, 4-Hydroxythieno[2,3-d]pyrimidine, Thieno[2,3-d]pyrimidin-4(1H)-one, Thieno[2,3-d]pyrimidin-4-ol
Thieno[2,3-d]pyrimidin-4(3H)-one (CAS 14080-50-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H4N2OS and a molecular weight of 152.174 g/mol. Key properties include a melting point of 262-265ºC, a boiling point of 391.1±15.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 190.3±20.4 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 14080-50-3
- Jingsj CID
- J-1120287-2
- Molecular Formula
- C6H4N2OS
- Molecular Weight
- 152.174 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 262-265ºC |
|---|---|
| Boiling Point | 391.1±15.0 °C at 760 mmHg |
| Density | 1.6±0.1 g/cm3 |
| Flash Point | 190.3±20.4 °C |
| Exact Mass | 152.004440 |
| PSA | 73.99000 |
| LogP | 0.45 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.801 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
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-d]pyrimidin-4(3H)-one?
The CAS number of Thieno[2,3-d]pyrimidin-4(3H)-one is 14080-50-3.
What are the molecular formula and molecular weight of Thieno[2,3-d]pyrimidin-4(3H)-one?
Thieno[2,3-d]pyrimidin-4(3H)-one has molecular formula C6H4N2OS and molecular weight 152.174 g/mol.
Is Thieno[2,3-d]pyrimidin-4(3H)-one hazardous?
Thieno[2,3-d]pyrimidin-4(3H)-one has GHS signal word Warning and hazard statements H302 — Harmful if swallowed.
What are the upstream and downstream products of Thieno[2,3-d]pyrimidin-4(3H)-one?
For Thieno[2,3-d]pyrimidin-4(3H)-one, Upstream Products: Methyl 2-aminothiophene-3-carboxylate, Methanimidic acid, (Z)-, 2-Aminothiophene-3-carbonitrile; Downstream Products: 4-chloro-6-phenylthieno[2,3-d]pyrimidine, (4-Oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetic acid, 5-Bromo-4-chlorothieno[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. "Thieno[2,3-d]pyrimidin-4(3H)-one (CAS 14080-50-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1120287-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.