Description

2,4-Dihydro-2-[4-[(2-Hydroxyethyl)Sulfonyl]Phenyl]-5-Methyl-3H-Pyrazol-3-On is a specialized organic compound featuring a pyrazolone core functionalized with a hydroxethylsulfonylphenyl group. This unique structure makes it a valuable high-purity intermediate for the synthesis of advanced functional materials and active pharmaceutical ingredients (APIs). It is primarily sought by research institutions, fine chemical manufacturers, and pharmaceutical developers engaged in creating novel dyes, pigments, and therapeutic agents.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of novel drug candidates, particularly those targeting anti-inflammatory or analgesic pathways.
• Dye & Pigment Synthesis: Serves as a crucial precursor for manufacturing high-performance disperse dyes and organic pigments used in textiles and plastics.
• Chemical Research: Used in academic and industrial R&D for exploring new heterocyclic compounds and sulfone-based chemistry.
• Fine Chemical Production: Intermediate in the multi-step synthesis of complex molecules for agrochemicals and specialty chemicals.
• Material Science: Potential monomer or additive in the development of advanced polymeric materials with specific optical or electronic properties.

Basic Information

Product Name	2,4-Dihydro-2-[4-[(2-Hydroxyethyl)Sulfonyl]Phenyl]-5-Methyl-3H-Pyrazol-3-On
CAS No.	21951-34-8
Molecular Formula	C₁₂H₁₄N₂O₄S
Molecular Weight	282.32 g/mol
Synonyms	5-Methyl-2-[4-(2-sulfoethyl)phenyl]-2,4-dihydro-3H-pyrazol-3-one; 2-(4-(2-Hydroxyethylsulfonyl)phenyl)-5-methyl-2,4-dihydro-3H-pyrazol-3-one; 5-Methyl-2-[4-[(2-hydroxyethyl)sulfonyl]phenyl]-2,4-dihydro-3H-pyrazol-3-one; CAS 21951-34-8; Pyrazolone derivative with hydroxethylsulfonylphenyl group; 2,4-Dihydro-5-methyl-2-[4-[(2-hydroxyethyl)sulfonyl]phenyl]-3H-pyrazol-3-one
EINECS	Contact for details

Quality Control

Our 2,4-Dihydro-2-[4-[(2-Hydroxyethyl)Sulfonyl]Phenyl]-5-Methyl-3H-Pyrazol-3-On is produced under a strict quality management system. Every batch undergoes rigorous analytical testing including HPLC, NMR, and IR spectroscopy to ensure identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all specified parameters to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 0.5%

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