1-(4-nitrothiophen-2-yl)ethanone

Also known as: 1-(4-Nitro-2-thienyl)ethanone, 2-Acetyl-4-nitrothiophene, Ethanone, 1-(4-nitro-2-thienyl)-, 1-(4-Nitrothiophen-2-yl)ethan-1-one, 1-(4'-nitro-2'-thienyl)ethanone, 1-(4-Nitro-[2]thienyl)-aethanon, 3-Nitro-5-acetyl-thiophen

1-(4-nitrothiophen-2-yl)ethanone (CAS 42791-51-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H5NO3S and a molecular weight of 171.17400 g/mol. Key properties include a boiling point of 280.9ºC at 760 mmHg, a density of 1.399g/cm3 and a flash point of 123.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 42791-51-5
Jingsj CID: J-1377851-3
Molecular Formula: C₆H₅NO₃S
Molecular Weight: 171.17400 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	280.9ºC at 760 mmHg
Density	1.399g/cm3
Flash Point	123.7ºC
Exact Mass	170.99900
PSA	91.13000
LogP	2.38210
Refractive Index	1.589

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-nitrothiophen-2-yl)ethanone?

The CAS number of 1-(4-nitrothiophen-2-yl)ethanone is 42791-51-5.

What are the molecular formula and molecular weight of 1-(4-nitrothiophen-2-yl)ethanone?

1-(4-nitrothiophen-2-yl)ethanone has molecular formula C6H5NO3S and molecular weight 171.17400 g/mol.

What are the upstream and downstream products of 1-(4-nitrothiophen-2-yl)ethanone?

For 1-(4-nitrothiophen-2-yl)ethanone, Upstream Products: 2-Acetylthiophene, 5-Acetylthiophene-2-carbaldehyde, 4-Nitrothiophene-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-(4-nitrothiophen-2-yl)ethanone (CAS 42791-51-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1377851-3 (accessed 2026-11-09).

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