Description

4-[4-[[5-Chloro-2-(2-Chlorophenoxy)Phenyl]Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid is a specialized azo dye intermediate known for its distinct chromophoric structure. This compound is valued for its role in synthesizing high-performance pigments and dyes, offering excellent color fastness and thermal stability. It is primarily sought after by manufacturers in the pigments, inks, and specialty coatings industries for producing vibrant and durable colorants.

Application

• Key intermediate for the synthesis of high-performance azo pigments and dyes.
• Used in the manufacturing of colorants for industrial inks, including printing and packaging inks.
• Essential component in the production of pigments for plastics and synthetic fibers.
• Applied in the formulation of specialty coatings and paints requiring enhanced weather resistance.
• Potential use in the research and development of functional dyes for non-textile applications.
• Serves as a chemical building block in organic synthesis for advanced material science.

Basic Information

Product Name	4-[4-[[5-Chloro-2-(2-Chlorophenoxy)Phenyl]Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid
CAS No.	85136-65-8
Molecular Formula	C22H16Cl2N4O5S
Molecular Weight	519.36 g/mol
Synonyms	Benzenesulfonic acid, 4-[4-[[5-chloro-2-(2-chlorophenoxy)phenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-; 4-(4-((5-Chloro-2-(2-chlorophenoxy)phenyl)diazenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulfonic acid; Azo dye intermediate 85136-65-8; 1-(4-Sulfophenyl)-3-methyl-4-[5-chloro-2-(2-chlorophenoxy)phenylazo]-5-pyrazolone; CI 12715 (related class); Pigment Yellow 191 (related); Disperse dye intermediate.
EINECS	Contact for details

Quality Control

Our production of this azo intermediate adheres to strict quality protocols to ensure batch-to-batch consistency and purity for sensitive synthesis processes. Quality is verified through advanced analytical techniques including HPLC and spectroscopic methods. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance systems.

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 sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 97.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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