Description

Ethyl 4-[(2,5-Dichlorophenyl)Azo]-4,5-Dihydro-5-Oxo-1-Phenyl-1H-Pyrazole-3-Carboxylate is a specialized azo pyrazolone derivative, a high-value chemical intermediate prized for its chromophoric properties and structural versatility. This compound is critical for manufacturers requiring precise colorant synthesis and advanced material development. It serves as a key building block for the production of pigments, dyes, and functional materials in the chemical, textile, and advanced manufacturing sectors.

Application

• Pigment and Dye Intermediate: Primary use as a precursor in the synthesis of high-performance organic pigments and azo dyes, imparting specific color and stability properties.
• Functional Material Synthesis: Used in the research and development of advanced materials, including liquid crystals and photoconductive polymers.
• Textile Colorants: Key intermediate for producing colorants used in the dyeing and printing of synthetic and natural fibers.
• Ink Manufacturing: Serves as a crucial component in formulating specialty inks for packaging, printing, and security applications.
• Chemical Research (R&D): Employed in academic and industrial laboratories as a model compound for studying azo coupling reactions and heterocyclic chemistry.
• Plastics and Polymer Coloring: Intermediate for colorants designed to be incorporated into plastics, resins, and coatings to achieve specific hues.

Basic Information

Product Name	Ethyl 4-[(2,5-Dichlorophenyl)Azo]-4,5-Dihydro-5-Oxo-1-Phenyl-1H-Pyrazole-3-Carboxylate
CAS No.	2008-88-0
Molecular Formula	C18H14Cl2N4O3
Molecular Weight	405.24 g/mol
Synonyms	Ethyl 1-Phenyl-3-carbethoxy-4-[(2,5-dichlorophenyl)azo]-5-pyrazolone; Ethyl 4-[(2,5-Dichlorophenyl)azo]-1-phenyl-3-pyrazoline-5-one-3-carboxylate; C.I. Pigment Yellow 191; PY 191; 1H-Pyrazole-3-carboxylic acid, 4-[(2,5-dichlorophenyl)azo]-4,5-dihydro-5-oxo-1-phenyl-, ethyl ester; Ethyl 4-(2,5-dichlorophenylazo)-1-phenyl-5-pyrazolone-3-carboxylate
EINECS	Contact for details

Quality Control

Our production of Ethyl 4-[(2,5-Dichlorophenyl)Azo]-4,5-Dihydro-5-Oxo-1-Phenyl-1H-Pyrazole-3-Carboxylate adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling, to meet exacting customer specifications. A detailed Certificate of Analysis (COA) documenting identity, purity, and relevant physical parameters is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area 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. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellow to Orange Crystalline Powder
Identification (IR)	Conforms to Structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual Impurity ≤ 0.5%; Total Impurities ≤ 1.5%

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