Jingsj
.mol.sdf

4-Amino-1-ethynylpyrimidin-2(1H)-one

4-氨基-1-乙炔基-2(1H)-嘧啶酮

Also known as: 2(1H)-Pyrimidinone, 4-amino-1-ethynyl- (9CI), 2(1H)-Pyrimidinone, 4-amino-1-ethynyl-, 4-Amino-1-ethynyl-1H-pyrimidin-2-one, 4-Amino-1-ethynyl-2(1H)-pyrimidinone, 1-Ethynyl-4-aminopyrimidine-2(1H)-one, N1-ethynylcytosine

4-Amino-1-ethynylpyrimidin-2(1H)-one (CAS 141299-26-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H5N3O and a molecular weight of 135.123 g/mol. It is also known as 2(1H)-Pyrimidinone, 4-amino-1-ethynyl- (9CI), 2(1H)-Pyrimidinone, 4-amino-1-ethynyl- and 4-Amino-1-ethynyl-1H-pyrimidin-2-one. Key properties include a boiling point of 265.4±23.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 114.3±22.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
141299-26-5
Jingsj CID
J-1523586-0
Molecular Formula
C6H5N3O
Chinese Name
4-氨基-1-乙炔基-2(1H)-嘧啶酮
Molecular Weight
135.123 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

No offers for this compound yet.

Request a quote

Physicochemical Properties

Boiling Point265.4±23.0 °C at 760 mmHg
Density1.2±0.1 g/cm3
Flash Point114.3±22.6 °C

Frequently Asked Questions

What is the CAS number of 4-Amino-1-ethynylpyrimidin-2(1H)-one?

The CAS number of 4-Amino-1-ethynylpyrimidin-2(1H)-one is 141299-26-5.

What are the molecular formula and molecular weight of 4-Amino-1-ethynylpyrimidin-2(1H)-one?

4-Amino-1-ethynylpyrimidin-2(1H)-one has molecular formula C6H5N3O and molecular weight 135.123 g/mol.

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

Last updated:

How to cite: Jingsj. "4-Amino-1-ethynylpyrimidin-2(1H)-one (CAS 141299-26-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1523586-0 (accessed 2026-10-25).

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