1-(4-Chlorothiophen-2-yl)ethanone
Also known as: 2-Acetyl-4-chlorothiophene, 4-Chloro-2-acetylthiophene, 1-(4-Chloro-2-thienyl)ethanone, Ethanone, 1-(4-chloro-2-thienyl)-, T5SJ BV1 DG
1-(4-Chlorothiophen-2-yl)ethanone (CAS 34730-20-6) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H5ClOS and a molecular weight of 160.621 g/mol. Key properties include a boiling point of 263.0±25.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 112.9±23.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 34730-20-6
- Jingsj CID
- J-1036110-1
- Molecular Formula
- C6H5ClOS
- Molecular Weight
- 160.621 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 263.0±25.0 °C at 760 mmHg |
|---|---|
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 112.9±23.2 °C |
| Exact Mass | 159.974960 |
| PSA | 45.31000 |
| LogP | 2.16 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.560 |
| Storage Conditions | 2-8°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 1-(4-Chlorothiophen-2-yl)ethanone?
The CAS number of 1-(4-Chlorothiophen-2-yl)ethanone is 34730-20-6.
What are the molecular formula and molecular weight of 1-(4-Chlorothiophen-2-yl)ethanone?
1-(4-Chlorothiophen-2-yl)ethanone has molecular formula C6H5ClOS and molecular weight 160.621 g/mol.
What are the upstream and downstream products of 1-(4-Chlorothiophen-2-yl)ethanone?
For 1-(4-Chlorothiophen-2-yl)ethanone, Upstream Products: 2-Acetylthiophene, 2-Acetyl-4,5-dichlorothiophene; Downstream Products: 4-chlorothiophene-2-carboxylic acid, 1-(5-Bromo-4-chlorothiophen-2-yl)ethan-1-one, 5-Bromo-4-chlorothiophene-2-carboxylic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1-(4-Chlorothiophen-2-yl)ethanone (CAS 34730-20-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1036110-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.