3-Hydroxy-1-methyl-1H-pyrazole
3-Hydroxy-1-methyl-1H-pyrazole (CAS 52867-35-3), with the molecular formula C4H6N2O and a molecular weight of 98.10 g/mol, is a heterocyclic organic compound. This pyrazole derivative serves as a valuable building block in chemical synthesis. Its structure lends itself to further functionalization, making it a useful intermediate in the development of more complex molecules for various research and industrial applications.
- IUPAC
- 1-Methyl-1,2-dihydro-3H-pyrazol-3-one,1-Methyl-3-pyrazolone,3-Hydroxy-1-methylpyrazole
- Synonyms
- 1-Methyl-1,2-dihydro-3H-pyrazol-3-one1-Methyl-3-pyrazolone

Organic Synthesis Intermediate
3-Hydroxy-1-methyl-1H-pyrazole is employed as a key intermediate in the synthesis of diverse organic molecules. Its reactive hydroxyl and pyrazole functionalities allow for a range of chemical transformations.
Heterocyclic Compound Synthesis
As a pyrazole derivative, this compound is integral in the construction of more complex heterocyclic systems. These structures are often found in pharmaceuticals and agrochemicals.
Research and Development
Used in laboratory settings for research purposes, it enables the exploration of novel chemical pathways and the creation of new chemical entities for various scientific investigations.
| Molecular weight | 98.10 |
|---|---|
| Empirical formula | C4H6N2O |
| Assay | 96% |
| Melting point | 124-128 °C |


Hazard statements
- H315Causes skin irritation
- H318Causes serious eye damage
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Water hazard class (WGK, DE) | 3 |
|---|---|
| Hazard codes (EU) | Xi |
| Risk statements (R) | 37/38-41 |
| Safety statements (S) | 26-39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 3-Hydroxy-1-methyl-1H-pyrazole used for?
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3-Hydroxy-1-methyl-1H-pyrazole is primarily used as a building block and intermediate in organic synthesis, particularly for creating more complex heterocyclic compounds for research and development.
What is the CAS number and formula for 3-Hydroxy-1-methyl-1H-pyrazole?
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The CAS number for 3-Hydroxy-1-methyl-1H-pyrazole is 52867-35-3, and its molecular formula is C4H6N2O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-Hydroxy-1-methyl-1H-pyrazole with an assay of 96%. We do not represent this product as USP, BP, or EP grade.
How should 3-Hydroxy-1-methyl-1H-pyrazole be handled safely?
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This compound is classified as Danger, with hazards including skin irritation (H315), serious eye damage (H318), and respiratory irritation (H335). Always use appropriate personal protective equipment, such as gloves, eye protection, and ensure adequate ventilation. Avoid breathing dust/fume/gas/mist/vapours/spray.
Is 3-Hydroxy-1-methyl-1H-pyrazole suitable for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals and reagents, including 3-Hydroxy-1-methyl-1H-pyrazole.
How can I request a sample or quote for 3-Hydroxy-1-methyl-1H-pyrazole?
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To request a sample or a quote for 3-Hydroxy-1-methyl-1H-pyrazole, please contact our sales team through the website or via the provided contact details.
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