1,5,6,7-Tetrahydrocyclopenta[d]pyrimidin-4-one

1,5,6,7-四氢环戊并[d]嘧啶-4-酮

Also known as: 3,5,6,7-Tetrahydro-4H-cyclopenta[d]pyrimidin-4-one, 6,7-Dihydro-5H-cyclopenta[d]pyrimidin-4-ol, 4H-Cyclopentapyrimidin-4-one, 3,5,6,7-tetrahydro-

1,5,6,7-Tetrahydrocyclopenta[d]pyrimidin-4-one (CAS 5661-01-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H8N2O and a molecular weight of 136.15100 g/mol. It is also known as 3,5,6,7-Tetrahydro-4H-cyclopenta[d]pyrimidin-4-one, 6,7-Dihydro-5H-cyclopenta[d]pyrimidin-4-ol and 4H-Cyclopentapyrimidin-4-one, 3,5,6,7-tetrahydro-. Key properties include a boiling point of 270.5ºC at 760mmHg, a density of 1.43g/cm3 and a flash point of 117.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
5661-01-8
Jingsj CID
J-1140876-7
Molecular Formula
C7H8N2O
Chinese Name
1,5,6,7-四氢环戊并[d]嘧啶-4-酮
Molecular Weight
136.15100 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point270.5ºC at 760mmHg
Density1.43g/cm3
Flash Point117.4ºC

Frequently Asked Questions

What is the CAS number of 1,5,6,7-Tetrahydrocyclopenta[d]pyrimidin-4-one?

The CAS number of 1,5,6,7-Tetrahydrocyclopenta[d]pyrimidin-4-one is 5661-01-8.

What are the molecular formula and molecular weight of 1,5,6,7-Tetrahydrocyclopenta[d]pyrimidin-4-one?

1,5,6,7-Tetrahydrocyclopenta[d]pyrimidin-4-one has molecular formula C7H8N2O and molecular weight 136.15100 g/mol.

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

Last updated:

How to cite: Jingsj. "1,5,6,7-Tetrahydrocyclopenta[d]pyrimidin-4-one (CAS 5661-01-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1140876-7 (accessed 2026-10-25).

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