1-Methyl-1H-pyrazolo[3,4-d]pyrimidin-4-ol

1-甲基-1,5-二氢吡唑并[3,4-d]嘧啶-4-酮

Also known as: 1-Methyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one, 1-Methyl-1H-pyrazolo[3,4-d]pyrimidin-4(7H)-one, 1-Methyl-4-hydroxypyrazolo[3,4-d]pyrimidine, 9-Methylallopurinol, 4-Hydroxy-1-methyl-1H-pyrazolo[3,4-d]pyrimidine, 4-Hydroxy-1-methylpyrazolo[3,4-d]pyrimidine, 1-methylpyrazolo[3,4-d]pyrimidin-4(5H)-one, 1-methyl-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one, NSC 1439, NSC 635171

1-Methyl-1H-pyrazolo[3,4-d]pyrimidin-4-ol (CAS 5334-56-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H6N4O and a molecular weight of 150.138 g/mol. It is also known as 1-Methyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one, 1-Methyl-1H-pyrazolo[3,4-d]pyrimidin-4(7H)-one and 1-Methyl-4-hydroxypyrazolo[3,4-d]pyrimidine. Key properties include a melting point of >250ºC, a boiling point of 426.5±18.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 211.8±21.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

5334-56-5

Jingsj CID

J-850638-0

Molecular Formula

C₆H₆N₄O

Chinese Name

1-甲基-1,5-二氢吡唑并[3,4-d]嘧啶-4-酮

Molecular Weight

150.138 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026