1,3-Dimethyl-1H-pyrazol-5-ol
1,3-二甲基-5-羟基吡唑
Also known as: 1,3-Dimethyl-5-hydroxypyrazole, 5-Hydroxy-1,3-dimethylpyrazole, 1,3-Dimethyl-1H-pyrazole-5-one, 2,5-Dimethyl-1,2-dihydropyrazol-3-one, 2,5-Dimethyl-3-pyrazolol, 2,5-Dimethyl-2H-pyrazol-3-ol, 1,3-Dimethyl-1H-pyrazol-5-one
1,3-Dimethyl-1H-pyrazol-5-ol (CAS 5203-77-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H8N2O and a molecular weight of 112.130 g/mol. It is also known as 1,3-Dimethyl-5-hydroxypyrazole, 5-Hydroxy-1,3-dimethylpyrazole and 1,3-Dimethyl-1H-pyrazole-5-one. Key properties include a melting point of 113-117ºC, a boiling point of 225.9±20.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 90.4±21.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 5203-77-0
- Jingsj CID
- J-849453-3
- Molecular Formula
- C5H8N2O
- Chinese Name
- 1,3-二甲基-5-羟基吡唑
- Molecular Weight
- 112.130 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 113-117ºC |
|---|---|
| Boiling Point | 225.9±20.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 90.4±21.8 °C |
Frequently Asked Questions
What is the CAS number of 1,3-Dimethyl-1H-pyrazol-5-ol?
The CAS number of 1,3-Dimethyl-1H-pyrazol-5-ol is 5203-77-0.
What are the molecular formula and molecular weight of 1,3-Dimethyl-1H-pyrazol-5-ol?
1,3-Dimethyl-1H-pyrazol-5-ol has molecular formula C5H8N2O and molecular weight 112.130 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,3-Dimethyl-1H-pyrazol-5-ol (CAS 5203-77-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-849453-3 (accessed 2026-10-24).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.