![Molecular structure of (4-Oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetic acid (CAS 18740-34-6)](/images/chem_structures_svg/251/18740-34-6.svg)
(4-Oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetic acid
Also known as: 2-(4-Oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetic acid, 2-(4-Oxothieno[2,3-d]pyrimidin-3-yl)acetic acid, Thieno[2,3-d]pyrimidine-3(4H)-acetic acid, 4-oxo-, 3-Carboxymethyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyrimidine, (4-Oxo-4H-thieno[2,3-d]pyrimidin-3-yl)-acetic acid, BB_SC-4126
(4-Oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetic acid (CAS 18740-34-6) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H6N2O3S and a molecular weight of 210.21000 g/mol. Key properties include a boiling point of 469.3ºC at 760mmHg, a density of 1.66g/cm3 and a flash point of 237.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 18740-34-6
- Jingsj CID
- J-1352466-8
- Molecular Formula
- C8H6N2O3S
- Molecular Weight
- 210.21000 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 469.3ºC at 760mmHg |
|---|---|
| Density | 1.66g/cm3 |
| Flash Point | 237.6ºC |
| Exact Mass | 210.01000 |
| PSA | 100.43000 |
| LogP | 0.54260 |
| Vapor Pressure | 1.31E-09mmHg at 25°C |
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 (4-Oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetic acid?
The CAS number of (4-Oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetic acid is 18740-34-6.
What are the molecular formula and molecular weight of (4-Oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetic acid?
(4-Oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetic acid has molecular formula C8H6N2O3S and molecular weight 210.21000 g/mol.
What are the upstream and downstream products of (4-Oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetic acid?
For (4-Oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetic acid, Upstream Products: Thieno[2,3-d]pyrimidin-4(3H)-one, Chloroacetic acid, 2-Aminothiophene-3-carbonitrile.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "(4-Oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetic acid (CAS 18740-34-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1352466-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.