Jingsj
.mol.sdf

3-Chlorobenzo[b]thiophene-2-carbonyl chloride

3-氯苯并[b]噻吩-2-羰酰氯

Also known as: 3-Chloro-1-benzothiophene-2-carbonyl chloride, 3-Chlorobenzothiophene-2-carbonyl chloride, Benzo[b]thiophene-2-carbonyl chloride, 3-chloro-, MFCD00053069

3-Chlorobenzo[b]thiophene-2-carbonyl chloride (CAS 21815-91-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H4Cl2OS and a molecular weight of 231.098 g/mol. It is also known as 3-Chloro-1-benzothiophene-2-carbonyl chloride, 3-Chlorobenzothiophene-2-carbonyl chloride and Benzo[b]thiophene-2-carbonyl chloride, 3-chloro-. Key properties include a melting point of 112-116 °C, a boiling point of 342.2±22.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 160.7±22.3 °C. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
21815-91-8
Jingsj CID
J-1394845-4
Molecular Formula
C9H4Cl2OS
Chinese Name
3-氯苯并[b]噻吩-2-羰酰氯
Molecular Weight
231.098 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point112-116 °C
Boiling Point342.2±22.0 °C at 760 mmHg
Density1.5±0.1 g/cm3
Flash Point160.7±22.3 °C

GHS Safety & Compliance

CorrosionSignal word: Danger

Frequently Asked Questions

What is the CAS number of 3-Chlorobenzo[b]thiophene-2-carbonyl chloride?

The CAS number of 3-Chlorobenzo[b]thiophene-2-carbonyl chloride is 21815-91-8.

What are the molecular formula and molecular weight of 3-Chlorobenzo[b]thiophene-2-carbonyl chloride?

3-Chlorobenzo[b]thiophene-2-carbonyl chloride has molecular formula C9H4Cl2OS and molecular weight 231.098 g/mol.

Is 3-Chlorobenzo[b]thiophene-2-carbonyl chloride hazardous?

3-Chlorobenzo[b]thiophene-2-carbonyl chloride has GHS signal word Danger.

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

Last updated:

How to cite: Jingsj. "3-Chlorobenzo[b]thiophene-2-carbonyl chloride (CAS 21815-91-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1394845-4 (accessed 2026-10-25).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.