3-Hydroxy-1-methyl-5-(trifluoromethyl)pyrazole
3-Hydroxy-1-methyl-5-(trifluoromethyl)pyrazole (CAS: 119022-51-4, C5H5F3N2O) is a trifluoromethylated pyrazole derivative supplied by Tech Serve Solutions. With a molecular weight of 166.10 g/mol, this heterocyclic compound serves as a valuable building block in organic synthesis. It is primarily utilised in chemical research and development for the construction of more complex molecular architectures, particularly in areas requiring fluorinated heterocyclic scaffolds.
- IUPAC
- 1-Methyl-5-trifluoromethyl-1H-pyrazol-3-ol

Organic Synthesis Intermediate
This compound functions as a key intermediate in multi-step organic syntheses. Its trifluoromethyl and hydroxyl functionalities offer versatile reaction sites for further chemical modification.
Research and Development
Utilised in academic and industrial research laboratories for the exploration of novel chemical entities and reaction pathways. Its structure is of interest for medicinal chemistry and materials science applications.
Heterocyclic Chemistry Building Block
As a substituted pyrazole, it is a useful component for building diverse heterocyclic systems. The presence of the trifluoromethyl group can influence the electronic properties and metabolic stability of target molecules.
| Molecular weight | 166.10 |
|---|---|
| Empirical formula | C5H5F3N2O |
| Assay | 97% |
| Melting point | 129-134 °C |

Hazard statements
- H301Toxic if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P301IF SWALLOWED
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 2811 6.1 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T |
| Risk statements (R) | 25-36/37/38 |
| Safety statements (S) | 26-45 |
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-5-(trifluoromethyl)pyrazole used for?
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3-Hydroxy-1-methyl-5-(trifluoromethyl)pyrazole is primarily used as a building block in organic synthesis and for research and development purposes in academic and industrial laboratories. Its structure is of interest for creating more complex fluorinated heterocyclic compounds.
What are the CAS number and formula for this chemical?
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The CAS number for 3-Hydroxy-1-methyl-5-(trifluoromethyl)pyrazole is 119022-51-4, and its molecular formula is C5H5F3N2O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-Hydroxy-1-methyl-5-(trifluoromethyl)pyrazole with an assay of 97%. TSS does not represent this product as USP, BP, EP, or any pharmacopoeia grade.
How should 3-Hydroxy-1-methyl-5-(trifluoromethyl)pyrazole be handled?
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This compound is classified as Danger, with hazards including H301 (Toxic if swallowed), H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Appropriate personal protective equipment, including eyeshields, faceshields, gloves, and a P2 respirator, should be used. Handle in a well-ventilated area and avoid ingestion, skin, and eye contact. Refer to the safety data sheet for comprehensive handling information.
Is this chemical suitable for export?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, pharmaceutical intermediates, and laboratory reagents, including 3-Hydroxy-1-methyl-5-(trifluoromethyl)pyrazole.
How can I request a sample or quote?
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Please contact our sales team directly through our website or by phone to request a sample or a quotation for 3-Hydroxy-1-methyl-5-(trifluoromethyl)pyrazole.
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