Description

1-Phenyl-3-Methyl-4-Diazo-1H-Pyrazole-5(4H)-One is a specialized heterocyclic diazo compound with significant utility in advanced organic synthesis. Its value lies in its role as a versatile precursor and building block for synthesizing complex molecules, particularly in the development of dyes, pigments, and photoactive materials. This compound is essential for R&D chemists and process engineers in the fine chemical, pharmaceutical intermediate, and advanced material sectors seeking high-purity functional intermediates.

Application

• Dye and Pigment Intermediate: Serves as a key precursor in the synthesis of azo dyes and high-performance organic pigments.
• Pharmaceutical Research: Used as a specialized building block in the development of novel active pharmaceutical ingredients (APIs) and heterocyclic compounds.
• Photoinitiator and Photoresist Component: Applied in the formulation of light-sensitive materials for imaging and electronics manufacturing.
• Chemical Synthesis Reagent: Functions as a diazo transfer agent or a source of the diazo functional group in complex organic transformations.
• Agrochemical Intermediate: Utilized in the research and development of advanced crop protection agents.
• Material Science Research: Investigated for the creation of novel polymers and functional materials with specific optical properties.

Basic Information

Product Name	1-Phenyl-3-Methyl-4-Diazo-1H-Pyrazole-5(4H)-One
CAS No.	1781-33-5
Molecular Formula	C10H8N4O
Molecular Weight	200.20 g/mol
Synonyms	4-Diazo-1-phenyl-3-methyl-1H-pyrazol-5(4H)-one; 1-Phenyl-3-methyl-4-diazopyrazol-5-one; 4-Diazo-1-phenyl-3-methylpyrazol-5-one; 1-Phenyl-3-methyl-4-diazo-δ²-pyrazolin-5-one; 4-Diazo-1-phenyl-3-methyl-5-pyrazolone; PMDP; Contact for additional trade names and abbreviations.
EINECS	217-218-0

Quality Control

Our 1-Phenyl-3-Methyl-4-Diazo-1H-Pyrazole-5(4H)-One is manufactured under strict quality protocols to ensure batch-to-batch consistency and high purity suitable for research and industrial synthesis. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, identity, and impurity profiles. Our quality management system is designed to meet the stringent requirements of fine chemical and pharmaceutical intermediate applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). Due to its light-sensitive and easily oxidized nature, it is recommended to store under an inert atmosphere (e.g., nitrogen or argon) for long-term stability. Keep away from heat, sparks, open flames, and incompatible materials.

Specification

Item	Specification
Appearance	Yellow to orange crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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