3,4-Dichlorothiophene

Also known as: Thiophene, 3,4-dichloro-, 3,4-dichloro-thiophene, 3,4-dichlor-thiophen

3,4-Dichlorothiophene (CAS 17249-76-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H2Cl2S and a molecular weight of 153.03000 g/mol. Key properties include a boiling point of 185ºC at 760mmHg, a density of 1.488g/cm3 and a flash point of 77.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 17249-76-2
Jingsj CID: J-1496709-0
Molecular Formula: C₄H₂Cl₂S
Molecular Weight: 153.03000 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	185ºC at 760mmHg
Density	1.488g/cm3
Flash Point	77.2ºC
Exact Mass	151.92500
PSA	28.24000
LogP	3.05490
Vapor Pressure	0.976mmHg at 25°C
Refractive Index	1.584

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 3,4-Dichlorothiophene?

The CAS number of 3,4-Dichlorothiophene is 17249-76-2.

What are the molecular formula and molecular weight of 3,4-Dichlorothiophene?

3,4-Dichlorothiophene has molecular formula C4H2Cl2S and molecular weight 153.03000 g/mol.

What are the upstream and downstream products of 3,4-Dichlorothiophene?

For 3,4-Dichlorothiophene, Upstream Products: 2,5-Dichlorothiophene, 2,3,4-trichlorothiophene, Ethanol.

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. "3,4-Dichlorothiophene (CAS 17249-76-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1496709-0 (accessed 2026-11-09).

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