Thieno[2,3-b]pyridine

Also known as: Thieno[2,3-b]pyridine (8CI,9CI), NSC 152397

Thieno[2,3-b]pyridine (CAS 272-23-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H5NS and a molecular weight of 135.186 g/mol. Key properties include a boiling point of 236.5±13.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 100.2±10.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 272-23-1
Jingsj CID: J-1418457-7
Molecular Formula: C₇H₅NS
Molecular Weight: 135.186 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	236.5±13.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	100.2±10.2 °C
Exact Mass	135.014267
PSA	41.13000
LogP	3.02
Vapor Pressure	0.1±0.5 mmHg at 25°C
Refractive Index	1.689

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 Thieno[2,3-b]pyridine?

The CAS number of Thieno[2,3-b]pyridine is 272-23-1.

What are the molecular formula and molecular weight of Thieno[2,3-b]pyridine?

Thieno[2,3-b]pyridine has molecular formula C7H5NS and molecular weight 135.186 g/mol.

What are the upstream and downstream products of Thieno[2,3-b]pyridine?

For Thieno[2,3-b]pyridine, Upstream Products: 2-Nitrothiophene, 1,1,3,3-Tetraethoxypropane, 2-bromo-6-chlorothieno[2,3-b]pyridine; Downstream Products: 3-Bromothieno[2,3-b]pyridine, Thieno[2,3-b]pyridine-2-carbaldehyde, Thieno[2,3-b]pyridine-6-carbonitrile.

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. "Thieno[2,3-b]pyridine (CAS 272-23-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1418457-7 (accessed 2026-11-09).

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