1-(4-Chlorophenyl)-3-methyl-2-pyrazolin-5-one
1-(4-Chlorophenyl)-3-methyl-2-pyrazolin-5-one (CAS 13024-90-3) is a substituted pyrazol-5-one heterocyclic building block, molecular formula C10H9ClN2O and molar mass 208.64 g/mol. A chlorophenyl-substituted analogue of antipyrine-type pyrazolones, it is a crystalline solid (m.p. 167-171 °C) used chiefly as a synthetic intermediate and reactive scaffold in chemical research and fine-chemical synthesis. Tech Serve Solutions supplies it as a research-grade reagent at 97% assay.
- IUPAC
- 1-(4-Chlorophenyl)-3-methyl-5-pyrazolone,2-(4-Chlorophenyl)-2,4-dihydro-5-methyl-3H-pyrazol-3-one,3-Methyl-1-(4-chlorophenyl)-5-pyrazolone
- Synonyms
- 1-(4-Chlorophenyl)-3-methyl-2-pyrazolin-5-one1-(4-Chlorophenyl)-3-methyl-5-pyrazolone3-Methyl-1-(4-chlorophenyl)-5-pyrazolone2-(4-Chlorophenyl)-2,4-dihydro-5-methyl-3H-pyrazol-3-one4'-Chloro-3-methyl-1-phenyl-2-pyrazolin-5-one
Heterocyclic building block
Serves as a pyrazol-5-one scaffold for constructing more elaborate heterocyclic systems. The active 4-position methylene and the ring nitrogen offer convenient handles for condensation, alkylation and functionalisation.
Pharmaceutical and fine-chemical intermediate
Used in research and development as an intermediate towards pyrazolone-derived target molecules. It belongs to the same chemical family as well-known antipyrine and edaravone-type pyrazolones.
Synthesis of dyes and pigments
Pyrazol-5-ones are classical coupling components for azo dyes and related colourants. This 4-chlorophenyl derivative can be employed where a halogen-substituted aryl pyrazolone is required.
Chelating and analytical chemistry
Pyrazolones of this type are studied as ligands and chelating agents for metal ions, supporting laboratory and analytical method development.
Laboratory reference and research reagent
Supplied at 97% assay for use as a characterised reagent in academic and industrial laboratories where a defined halogenated pyrazolone is needed.
| Molecular weight | 208.64 |
|---|---|
| Empirical formula | C10H9ClN2O |
| Assay | 97% |
| Melting point | 167-171 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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-(4-Chlorophenyl)-3-methyl-2-pyrazolin-5-one used for?
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It is used mainly as a heterocyclic building block and synthetic intermediate. The pyrazol-5-one ring is a versatile scaffold for further functionalisation in fine-chemical and pharmaceutical research, and pyrazolones of this class also serve as coupling components for dyes and as chelating ligands. Specific end-uses depend on the customer's process.
What is the CAS number and molecular formula of 1-(4-Chlorophenyl)-3-methyl-2-pyrazolin-5-one?
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The CAS number is 13024-90-3 and the molecular formula is C10H9ClN2O, with a molecular weight of 208.64 g/mol. Its MDL number is MFCD00043814 and its EC number is 235-884-9.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound as a research/technical-grade reagent at 97% assay, a crystalline solid with a literature melting point of 167-171 °C. We do not represent it as a USP, BP or EP pharmacopoeia grade. A certificate of analysis is provided with each batch and full specifications are available on request.
What are the handling and safety precautions for this compound?
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Handle it as a laboratory chemical using good practice. Recommended personal protective equipment includes eye shields, gloves and an N95 (US) or P1 (EN143) respirator filter to avoid dust inhalation. It is classified WGK 3 in Germany, meaning it is severely hazardous to water, so prevent release to drains, soil or watercourses. Always consult the Safety Data Sheet before use.
Is 1-(4-Chlorophenyl)-3-methyl-2-pyrazolin-5-one a controlled or scheduled substance?
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The supplied data does not indicate any narcotic, psychotropic or precursor control status for this compound. It is offered for research and industrial use. Customers remain responsible for confirming the regulatory position in their own jurisdiction before import or use.
How is 1-(4-Chlorophenyl)-3-methyl-2-pyrazolin-5-one packed, shipped and exported?
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It is packed in tightly closed, labelled containers appropriate to the order quantity, from gram-scale laboratory packs to bulk, with packaging sized to keep the solid dry. Tech Serve Solutions exports worldwide with full documentation, including a certificate of analysis and Safety Data Sheet. Please share your destination and quantity so we can advise the most suitable packing.
How do I request a sample or quote?
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Contact Tech Serve Solutions with the product name or CAS number 13024-90-3, your required quantity and grade, and your delivery location. We will respond with availability, lead time, documentation and a formal quotation, and can arrange a sample where appropriate.
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