Pyrimido[5,4-e]-1,2,4-triazin-5(6H)-one

嘧啶并[5,4-e]-1,2,4-三嗪-5(6H)-酮

Also known as: Pyrimido[5,4-e]-1,2,4-triazin-5(6H)-one (9CI), Pyrimido[5,4-e]-as-triazin-5(6H)-one (8CI), 4-Hydroxy-7-azapteridine, NSC 101504, Pyrimido[5,4-e]-as-triazin-5-ol, 5-Oxo-5,6-dihydro-pyrimido[5,4-e]-asymm.-triazin, 6H-Pyrimido[5,4-e][1,2,4]triazin-5-one

Pyrimido[5,4-e]-1,2,4-triazin-5(6H)-one (CAS 19359-64-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H3N5O and a molecular weight of 149.11000 g/mol. It is also known as Pyrimido[5,4-e]-1,2,4-triazin-5(6H)-one (9CI), Pyrimido[5,4-e]-as-triazin-5(6H)-one (8CI) and 4-Hydroxy-7-azapteridine. Key properties include a boiling point of 461.9ºC at 760mmHg, a density of 1.94g/cm3 and a flash point of 233.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

19359-64-9

Jingsj CID

J-1083440-0

Molecular Formula

C₅H₃N₅O

Chinese Name

嘧啶并[5,4-e]-1,2,4-三嗪-5(6H)-酮

Molecular Weight

149.11000 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026