5-Hydroxy-1-methyl-3-(trifluoromethyl)pyrazole
5-Hydroxy-1-methyl-3-(trifluoromethyl)pyrazole (CAS: 122431-37-2; C5H5F3N2O) is a specialised heterocyclic building block. With a molecular weight of 166.10 g/mol and an assay of ≥97%, this pyrazole derivative is primarily utilised in chemical synthesis and research applications. Its structure, featuring a trifluoromethyl group and a hydroxyl substituent on the pyrazole ring, makes it a valuable intermediate for developing novel organic compounds. Tech Serve Solutions offers this product for laboratory and industrial synthesis.
- IUPAC
- 1-Methyl-3-trifluoromethyl-1H-pyrazol-5-ol,2-Methyl-5-trifluoromethyl-2H-pyrazol-3-ol
- Synonyms
- 1-Methyl-3-trifluoromethyl-1H-pyrazol-5-ol2-Methyl-5-trifluoromethyl-2H-pyrazol-3-ol

Organic Synthesis Intermediate
This compound serves as a key building block in organic synthesis, enabling the construction of more complex molecules. Its trifluoromethyl and hydroxyl functionalities offer versatile reaction sites for further chemical modification.
Heterocyclic Chemistry Research
As a substituted pyrazole, it is an important reagent for researchers exploring novel heterocyclic compounds. It can be used in the development of new chemical entities with potential applications in pharmaceuticals and agrochemicals.
Fluorinated Compound Development
The presence of the trifluoromethyl group makes this compound relevant in the synthesis of fluorinated organic materials. Fluorine incorporation often imparts unique properties, such as increased stability and lipophilicity.
| Molecular weight | 166.10 |
|---|---|
| Empirical formula | C5H5F3N2O |
| Assay | ≥97% |
| Melting point | 172-178 °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 5-Hydroxy-1-methyl-3-(trifluoromethyl)pyrazole used for?
+
5-Hydroxy-1-methyl-3-(trifluoromethyl)pyrazole is primarily used as a building block in organic synthesis and for research in heterocyclic chemistry, particularly in the development of fluorinated compounds.
What is the CAS number and chemical formula for 5-Hydroxy-1-methyl-3-(trifluoromethyl)pyrazole?
+
The CAS number is 122431-37-2, and the chemical formula is C5H5F3N2O.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies 5-Hydroxy-1-methyl-3-(trifluoromethyl)pyrazole with an assay of ≥97%. This product is intended for research and chemical synthesis; TSS does not represent it as USP, BP, EP, or other pharmacopoeia grades.
How should 5-Hydroxy-1-methyl-3-(trifluoromethyl)pyrazole be handled safely?
+
This compound is classified as acutely toxic if swallowed and causes skin and eye irritation, and may cause respiratory irritation. Handle with appropriate personal protective equipment including eyeshields, faceshields, gloves, and a type P2 respirator. Ensure adequate ventilation. Refer to the Safety Data Sheet for detailed handling instructions.
Is this product available for export?
+
Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including 5-Hydroxy-1-methyl-3-(trifluoromethyl)pyrazole.
How can I request a sample or quote?
+
To request a sample or a quotation for 5-Hydroxy-1-methyl-3-(trifluoromethyl)pyrazole, please contact our sales department through the website or by phone.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis