Description

2,4-Dihydro-3-Methyl-2-Phenethyl-3H-Pyrazol-3-One CAS NO 131-65-7 is a heterocyclic organic compound belonging to the pyrazolone class, serving as a versatile chemical intermediate. Its structure makes it valuable for synthesizing more complex molecules, particularly in the development of active pharmaceutical ingredients (APIs) and fine chemicals. This product is essential for research and manufacturing organizations in the pharmaceutical, agrochemical, and specialty chemical sectors seeking reliable, high-purity building blocks.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of various active pharmaceutical ingredients (APIs), particularly those with analgesic or anti-inflammatory properties.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides and herbicides, leveraging its heterocyclic core.
• Fine Chemical Production: Serves as a precursor in the manufacture of dyes, pigments, and other performance chemicals.
• Research & Development: A valuable compound for medicinal chemistry and organic synthesis research in academic and industrial laboratories.
• Chemical Synthesis: Employed in multi-step synthetic routes to create complex heterocyclic compounds and novel molecular entities.

Basic Information

Product Name	2,4-Dihydro-3-Methyl-2-Phenethyl-3H-Pyrazol-3-One
CAS No.	131-65-7
Molecular Formula	C₁₂H₁₄N₂O
Molecular Weight	202.25 g/mol
Synonyms	3-Methyl-2-phenethyl-2,4-dihydro-3H-pyrazol-3-one; 3-Methyl-1-phenethyl-2-pyrazolin-5-one; 1-Phenethyl-3-methyl-5-pyrazolone; Phenethylmethylpyrazolone; Antipyrine derivative; 2-Phenethyl-3-methyl-5-pyrazolone; 131-65-7; NSC 406279
EINECS	205-028-9

Quality Control

Our 2,4-Dihydro-3-Methyl-2-Phenethyl-3H-Pyrazol-3-One is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for synthetic applications. Certificates of Analysis (COA) documenting identity, purity, and impurity profiles are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled 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	92°C - 96°C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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