5-Hydroxy-1-methylpyrazole

1-甲基-5-羟基吡唑

Also known as: 1-Methyl-1H-pyrazol-5-ol, 1-Methyl-5-hydroxy-1H-pyrazole, 1-Methyl-5-hydroxypyrazole, 1-Methylpyrazol-5-ol, 3-Hydroxy-2-methylpyrazole, N-Methylpyrazolone

CAS No.
33641-15-5
Jingsj CID
J-1051360-6
Molecular Formula
C4H6N2O
Chinese Name
1-甲基-5-羟基吡唑
Molecular Weight
98.103 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point110-114ºC
Boiling Point217.7±13.0 °C at 760 mmHg
Density1.2±0.1 g/cm3
Flash Point85.4±19.8 °C

Frequently Asked Questions

What is the CAS number of 5-Hydroxy-1-methylpyrazole?

33641-15-5

What are the molecular formula and molecular weight of 5-Hydroxy-1-methylpyrazole?

C4H6N2O, molecular weight 98.103 g/mol

Data compiled from public chemical databases and supplier catalogs; verify specifications with suppliers before purchase. · Last updated: 8/21/2026