Description

Ethyl 4-[[5-[[2-(Acetoxy)Ethyl]Sulphonyl]-2-Methoxyphenyl]Azo]-4,5-Dihydro-5-Oxo-1-Phenyl-1H-Pyrazole-3-Carboxylate is a high-purity, synthetic organic compound belonging to the pyrazolone azo dye class. This specialized chemical serves as a crucial chromophore intermediate for producing vivid and stable colorants. It is primarily required by manufacturers in the textile, ink, and specialty polymer industries seeking to develop advanced coloring agents with specific performance characteristics.

Application

• Primary Intermediate for Disperse Dyes: A key building block in the synthesis of high-performance disperse dyes for polyester and acetate fibers.
• Specialty Ink Formulations: Used in the production of pigments for inks requiring specific hue, lightfastness, and solvent resistance.
• Functional Polymer Additives: Imparts color to engineering plastics, resins, and coatings where thermal stability is critical.
• Research & Development: Serves as a reference standard and starting material for developing novel colorants and functional materials in R&D laboratories.
• Analytical Chemistry: Can be utilized as a reagent or standard in chromatographic analysis and method development for dye-related compounds.

Basic Information

Product Name	Ethyl 4-[[5-[[2-(Acetoxy)Ethyl]Sulphonyl]-2-Methoxyphenyl]Azo]-4,5-Dihydro-5-Oxo-1-Phenyl-1H-Pyrazole-3-Carboxylate
CAS No.	85409-55-8
Molecular Formula	C23H22N4O8S
Molecular Weight	514.51 g/mol
Synonyms	Ethyl 4-[(5-[(2-acetoxyethyl)sulfonyl]-2-methoxyphenyl)azo]-4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylate; Disperse Yellow 211; C.I. 127700; 1-Phenyl-3-carbethoxy-4-[5'-(β-acetoxyethylsulfonyl)-2'-methoxyphenylazo]-5-pyrazolone; 4-[[5-[[2-(Acetyloxy)ethyl]sulfonyl]-2-methoxyphenyl]azo]-4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylic acid ethyl ester; Pyrazolone Azo Dye Intermediate; Azo Pyrazolone Derivative
EINECS	Contact for details

Quality Control

Our production of Ethyl 4-[[5-[[2-(Acetoxy)Ethyl]Sulphonyl]-2-Methoxyphenyl]Azo]-4,5-Dihydro-5-Oxo-1-Phenyl-1H-Pyrazole-3-Carboxylate adheres to stringent in-process controls to ensure batch-to-batch consistency and high purity. Every lot is analyzed against established specifications using advanced techniques like HPLC and NMR. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided to guarantee the material meets your specific application requirements.

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). Keep away from heat sources and incompatible materials. Due to its light-sensitive nature, containers should be opaque or stored in dark conditions to prevent degradation.

Specification

Item	Specification
Appearance	Yellow to orange crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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