Description

3-Methyl-2-Pyrazolin-5-One (CAS NO 108-26-9) is a versatile heterocyclic organic compound that serves as a critical building block in advanced chemical synthesis. Its value lies in its reactive pyrazolone core, which is essential for constructing a wide range of pharmacologically and industrially important molecules. This high-purity intermediate is primarily needed by manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries for developing active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of various drugs, including analgesics, antipyretics, and anti-inflammatory agents.
• Agrochemical Synthesis: Used in the production of certain herbicides, fungicides, and plant growth regulators.
• Dye and Pigment Manufacturing: Serves as a coupling agent and intermediate in the synthesis of azo dyes and other colorants.
• Chemical Research & Development: Employed as a versatile scaffold in medicinal chemistry and material science for creating novel compounds.
• Photographic Chemicals: Can be used in the formulation of certain photographic developers and sensitizers.
• Polymer Additives: Acts as a component in stabilizers or modifiers for specific polymer systems.

Basic Information

Product Name	3-Methyl-2-Pyrazolin-5-One
CAS No.	108-26-9
Molecular Formula	C4H6N2O
Molecular Weight	98.10 g/mol
Synonyms	3-Methyl-5-pyrazolone; 3-Methyl-1H-pyrazol-5-one; 5-Methyl-2-pyrazolin-3-one; 3-Methyl-2-pyrazolin-5-one; 3-Methyl-5-pyrazolinone; 5-Methyl-2-pyrazolin-3-one; 3-Methyl-1,2-dihydropyrazol-5-one; 3-Methyl-δ²-pyrazolin-5-one
EINECS	203-565-7

Quality Control

Our 3-Methyl-2-Pyrazolin-5-One is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for synthesis applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to guarantee traceability and consistency for our B2B partners.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	127 - 131 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.