4-Mercaptopyridine-3-carboxylic acid

Also known as: 4-Mercaptonicotinic acid, 4-Mercapto-3-pyridinecarboxylic acid, 3-Pyridinecarboxylic acid, 4-mercapto-, 4-sulfanylpyridine-3-carboxylic acid, 4-sulfanylnicotinic acid, thionicotinic acid

4-Mercaptopyridine-3-carboxylic acid (CAS 18103-73-6) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H5NO2S and a molecular weight of 155.17400 g/mol. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 18103-73-6
Jingsj CID: J-1331569-0
Molecular Formula: C₆H₅NO₂S
Molecular Weight: 155.17400 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Exact Mass	155.00400
PSA	88.99000
LogP	1.06850

Customs & Trade Information

HS Code	2933399090
Summary	2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. 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 4-Mercaptopyridine-3-carboxylic acid?

The CAS number of 4-Mercaptopyridine-3-carboxylic acid is 18103-73-6.

What are the molecular formula and molecular weight of 4-Mercaptopyridine-3-carboxylic acid?

4-Mercaptopyridine-3-carboxylic acid has molecular formula C6H5NO2S and molecular weight 155.17400 g/mol.

What are the upstream and downstream products of 4-Mercaptopyridine-3-carboxylic acid?

For 4-Mercaptopyridine-3-carboxylic acid, Upstream Products: 4-Hydroxynicotinic 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. "4-Mercaptopyridine-3-carboxylic acid (CAS 18103-73-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1331569-0 (accessed 2026-11-09).

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