3-Acetyl-2,5-dichlorothiophene

Also known as: 1-(2,5-Dichlorothiophen-3-yl)ethan-1-one, 1-(2,5-Dichloro-3-thienyl)ethanone, 2,5-Dichloro-3-acetylthiophene, Ethanone, 1-(2,5-dichloro-3-thienyl)-

3-Acetyl-2,5-dichlorothiophene (CAS 36157-40-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H4Cl2OS and a molecular weight of 195.066 g/mol. Key properties include a melting point of 37-40 °C(lit.), a boiling point of 233.9±40.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 95.3±27.3 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H312 — Harmful in contact with skin and H315 — Causes skin irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 36157-40-1
Jingsj CID: J-16287-8
Molecular Formula: C₆H₄Cl₂OS
Molecular Weight: 195.066 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	37-40 °C(lit.)
Boiling Point	233.9±40.0 °C at 760 mmHg
Density	1.5±0.1 g/cm3
Flash Point	95.3±27.3 °C
Exact Mass	193.935989
PSA	45.31000
LogP	2.82
Vapor Pressure	0.1±0.5 mmHg at 25°C
Refractive Index	1.576

GHS Safety & Compliance

IrritantSignal word: Warning

H302 — Harmful if swallowed
H312 — Harmful in contact with skin
H315 — Causes skin irritation
H319 — Causes serious eye irritation
H332 — Harmful if inhaled
H335 — May cause respiratory irritation

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 3-Acetyl-2,5-dichlorothiophene?

The CAS number of 3-Acetyl-2,5-dichlorothiophene is 36157-40-1.

What are the molecular formula and molecular weight of 3-Acetyl-2,5-dichlorothiophene?

3-Acetyl-2,5-dichlorothiophene has molecular formula C6H4Cl2OS and molecular weight 195.066 g/mol.

Is 3-Acetyl-2,5-dichlorothiophene hazardous?

3-Acetyl-2,5-dichlorothiophene has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H312 — Harmful in contact with skin; H315 — Causes skin irritation.

What are the upstream and downstream products of 3-Acetyl-2,5-dichlorothiophene?

For 3-Acetyl-2,5-dichlorothiophene, Upstream Products: 2,5-Dichlorothiophene, Acetyl chloride; Downstream Products: 5-Chlorothiophene-3-carboxylic acid, 2,5-Dichlorothiophene-3-carboxylic acid, 4,5-Dichlorothiophene-3-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. "3-Acetyl-2,5-dichlorothiophene (CAS 36157-40-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-16287-8 (accessed 2026-11-09).

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