1-Phenyl-5-(trifluoromethyl)-1H-pyrazole-4-carboxylic acid
1-Phenyl-5-(trifluoromethyl)-1H-pyrazole-4-carboxylic acid (CAS 98534-81-7), with the empirical formula C11H7F3N2O2 and a molecular weight of 256.18, is a heterocyclic building block. This pyrazole derivative is primarily utilised in chemical synthesis, serving as a valuable intermediate for the development of more complex molecules. Its trifluoromethyl substitution offers unique electronic properties, making it a compound of interest in organic chemistry research and development.

Organic Synthesis Intermediate
This compound serves as a key building block in the synthesis of novel organic molecules. Its pyrazole core and trifluoromethyl group provide a versatile platform for further chemical modifications.
Pharmaceutical Research
As a heterocyclic compound with a trifluoromethyl moiety, it is of interest in the discovery and development of new pharmaceutical agents, potentially influencing biological activity.
Material Science Applications
The unique structural features may lend themselves to applications in material science, where fluorinated organic compounds are often explored for their specific properties.
| Molecular weight | 256.18 |
|---|---|
| Empirical formula | C11H7F3N2O2 |
| Assay | 97% |
| Melting point | 134-138 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 21/22-36/37/38 |
| Safety statements (S) | 26-36/37 |
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 1-Phenyl-5-(trifluoromethyl)-1H-pyrazole-4-carboxylic acid used for?
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This compound is primarily used as a building block in organic synthesis and is of interest in pharmaceutical research and material science due to its heterocyclic structure and trifluoromethyl substituent.
What is the CAS number and formula for this compound?
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The CAS number is 98534-81-7, and the empirical formula is C11H7F3N2O2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this chemical with an assay of 97%. We do not represent it as USP, BP, or EP grade.
What are the safety and handling precautions for this chemical?
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This compound is classified as a Warning. It is harmful if swallowed, in contact with skin, and causes skin and serious eye irritation, and may cause respiratory irritation (H302, H312, H315, H319, H335). Recommended personal protective equipment includes a dust mask type N95 (US), eyeshields, and gloves. Ensure good ventilation.
How is this product packed and shipped?
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Products are carefully packed according to industry standards for safe transit and are exported globally by Tech Serve Solutions.
How can I request a sample or quote?
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Please contact our sales team via the website or by phone to request a sample or a formal quotation for 1-Phenyl-5-(trifluoromethyl)-1H-pyrazole-4-carboxylic acid.
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