![Molecular structure of 4-chloro-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidine (CAS 81765-97-1)](/images/chem_structures_svg/310/81765-97-1.svg)
4-chloro-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidine
Also known as: 4-CHLORO-2-METHYL-5,6,7,8-TETRAHYDROBENZO[4,5]THIENO[2,3-D]PYRIMIDINE, 4-CHLORO-2-METHYL-5,6,7,8-TETRAHYDRO[1]BENZOTHIENO[2,3-D]PYRIMIDINE, 4-Chloro-2-methyl-5,6,7,8-tetrahydrobenzo[b]thieno[2,3-d]pyrimidine, 4-chloro-2-methyl-5,6,7,8-tetrahydro<1>benzothieno<2,3-d>pyrimidine, [1]BENZOTHIENO[2,3-D]PYRIMIDINE,4-CHLORO-5,6,7,8-TETRAHYDRO-2-METHYL-, AKOS 92583, IFLAB-BB F0307-0219
4-chloro-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidine (CAS 81765-97-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H11ClN2S and a molecular weight of 238.73600 g/mol. Key properties include a melting point of 94ºC, a boiling point of 310.9ºC at 760 mmHg, a density of 1.367g/cm3 and a flash point of 141.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 81765-97-1
- Jingsj CID
- J-1524312-6
- Molecular Formula
- C11H11ClN2S
- Molecular Weight
- 238.73600 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 94ºC |
|---|---|
| Boiling Point | 310.9ºC at 760 mmHg |
| Density | 1.367g/cm3 |
| Flash Point | 141.8ºC |
| Exact Mass | 238.03300 |
| PSA | 54.02000 |
| LogP | 3.53190 |
| Refractive Index | 1.669 |
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-chloro-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidine?
The CAS number of 4-chloro-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidine is 81765-97-1.
What are the molecular formula and molecular weight of 4-chloro-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidine?
4-chloro-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidine has molecular formula C11H11ClN2S and molecular weight 238.73600 g/mol.
What are the upstream and downstream products of 4-chloro-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidine?
For 4-chloro-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidine, Upstream Products: Ethyl 2-amino-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate.
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-chloro-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidine (CAS 81765-97-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1524312-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.