1-(5-Ethylthiophen-2-yl)ethanone

Also known as: 1-(5-ethylthien-2-yl)ethanone, 1-(5-ethyl-2-thienyl)Ethanone, 1-(5-ethylthiophen-2-yl)ethan-1-one, 2-Ethyl-5-acetylthiophene, 2-acetyl-5-ethylthiophene, 5-ethyl-2-acetylthiophene, AKOS B020337, ART-CHEM-BB B020337, Ethanone, 1-(5-ethyl-2-thienyl)-

1-(5-Ethylthiophen-2-yl)ethanone (CAS 18761-46-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H10OS and a molecular weight of 154.22900 g/mol. Key properties include a boiling point of 256.4ºC at 760mmHg, a density of 1.076g/cm3 and a flash point of 108.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 18761-46-1
Jingsj CID: J-1176691-9
Molecular Formula: C₈H₁₀OS
Molecular Weight: 154.22900 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	256.4ºC at 760mmHg
Density	1.076g/cm3
Flash Point	108.9ºC
Exact Mass	154.04500
PSA	45.31000
LogP	2.51310
Vapor Pressure	0.0154mmHg at 25°C
Refractive Index	1.529

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-(5-Ethylthiophen-2-yl)ethanone?

The CAS number of 1-(5-Ethylthiophen-2-yl)ethanone is 18761-46-1.

What are the molecular formula and molecular weight of 1-(5-Ethylthiophen-2-yl)ethanone?

1-(5-Ethylthiophen-2-yl)ethanone has molecular formula C8H10OS and molecular weight 154.22900 g/mol.

What are the upstream and downstream products of 1-(5-Ethylthiophen-2-yl)ethanone?

For 1-(5-Ethylthiophen-2-yl)ethanone, Upstream Products: 2-Ethylthiophene, Acetyl chloride, 2-Acetylthiophene; Downstream Products: 2,5-Diethylthiophene, thiophene-2,5-dicarboxylic acid, 4-bromo-5-ethylthiophene-2-carboxylic acid.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "1-(5-Ethylthiophen-2-yl)ethanone (CAS 18761-46-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1176691-9 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.