5-(5-Chloro-2-hydroxy-4-methylphenyl)-1-phenylpyrazole
5-(5-Chloro-2-hydroxy-4-methylphenyl)-1-phenylpyrazole (CAS: 213690-56-3) is a halogenated heterocyclic compound with the molecular formula C16H13ClN2O and a molecular weight of 284.74 g/mol. This chemical serves as a valuable building block in organic synthesis, particularly in the development of novel chemical entities and complex molecular structures. Its utility extends across various research and development applications within the chemical industry.

Organic Synthesis Intermediate
This compound functions as a key intermediate in multi-step organic synthesis pathways. Its specific structural features enable its incorporation into more complex molecules, facilitating the creation of novel chemical entities.
Heterocyclic Chemistry Research
As a substituted pyrazole, it is of interest in heterocyclic chemistry research. Its structure allows for further functionalization and exploration of pyrazole-based chemical scaffolds.
Building Block for Specialty Chemicals
The compound's chlorohydroxyphenyl and phenylpyrazole moieties make it a useful building block for the synthesis of specialty chemicals and advanced materials.
| Molecular weight | 284.74 |
|---|---|
| Empirical formula | C16H13ClN2O |
| Assay | 97% |
| Melting point | 202-206 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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-(5-Chloro-2-hydroxy-4-methylphenyl)-1-phenylpyrazole used for?
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This compound is primarily used as a building block and intermediate in organic synthesis and chemical research, particularly within heterocyclic and medicinal chemistry fields.
What are the CAS number and chemical formula for this product?
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The CAS number is 213690-56-3, and the empirical formula is C16H13ClN2O.
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 this product as USP, BP, EP, or any other pharmacopoeia grade unless explicitly stated.
How should 5-(5-Chloro-2-hydroxy-4-methylphenyl)-1-phenylpyrazole be handled safely?
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Handle this chemical with appropriate personal protective equipment, including a dust mask (type N95 US recommended), eyeshields, and gloves. Avoid breathing dust and ensure adequate ventilation. Refer to the Safety Data Sheet for comprehensive handling information.
Is this chemical subject to any special controls or regulations?
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Based on the provided data, there are no explicit mentions of controlled or scheduled substance status. However, users should always comply with local regulations regarding chemical handling and use.
How is this chemical shipped and exported by TSS?
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Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals. This product is carefully packed and prepared for international shipment according to relevant regulations.
How can I request a quote or sample?
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To request a quote or sample, please contact our sales team through the TSS website or via the provided contact details, specifying the product name and CAS number.
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