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4-Thioxo-3,4-dihydropyrido[2,3-d]pyrimidin-2(1H)-one

Also known as: 4-mercapto-pyrido[3,2-e]pyrimidin-2-ol, 4-sulfanylidene-1H-pyrido[2,3-d]pyrimidin-2-one, 4-sulfanylpyrido[2,3-d]pyrimidin-2-ol, 4-thioxo-3,4-dihydro-1H-pyrido[2,3-d]pyrimidin-2-one, S03-0278, 3,4-dihydro-4-thioxopyrido[2,3-d]pyrimidin-2(1H)-one, Pyrido[2,3-d]pyrimidin-2(1H)-one, 3,4-dihydro-4-thioxo-

4-Thioxo-3,4-dihydropyrido[2,3-d]pyrimidin-2(1H)-one (CAS 91996-78-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H5N3OS and a molecular weight of 179.19900 g/mol. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
91996-78-0
Jingsj CID
J-1524445-8
Molecular Formula
C7H5N3OS
Molecular Weight
179.19900 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026
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Physicochemical Properties

Exact Mass179.01500
PSA93.63000
LogP0.98070

Frequently Asked Questions

What is the CAS number of 4-Thioxo-3,4-dihydropyrido[2,3-d]pyrimidin-2(1H)-one?

The CAS number of 4-Thioxo-3,4-dihydropyrido[2,3-d]pyrimidin-2(1H)-one is 91996-78-0.

What are the molecular formula and molecular weight of 4-Thioxo-3,4-dihydropyrido[2,3-d]pyrimidin-2(1H)-one?

4-Thioxo-3,4-dihydropyrido[2,3-d]pyrimidin-2(1H)-one has molecular formula C7H5N3OS and molecular weight 179.19900 g/mol.

What are the upstream and downstream products of 4-Thioxo-3,4-dihydropyrido[2,3-d]pyrimidin-2(1H)-one?

For 4-Thioxo-3,4-dihydropyrido[2,3-d]pyrimidin-2(1H)-one, Upstream Products: 2-Chloropyrido[2,3-d]pyrimidine-4(1H)-thione, 2-Aminonicotinic acid, N-(3-Methylpyridin-2-yl)acetamide.

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

Last updated:

How to cite: Jingsj. "4-Thioxo-3,4-dihydropyrido[2,3-d]pyrimidin-2(1H)-one (CAS 91996-78-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1524445-8 (accessed 2026-11-09).

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