Description

2,5-Dichloro-4-[4,5-Dihydro-3-Methyl-5-Oxo-4-[[3-[(Phenylamino)Sulphonyl]Phenyl]Azo]-1H-Pyrazol-1-Yl]Benzenesulphonic Acid is a high-purity, specialized azo dye intermediate with the CAS number 91101-21-2. This compound is valued for its role in synthesizing high-performance pigments and dyes, offering excellent color properties and structural stability. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries for producing vivid and durable colorants.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of high-performance red, orange, and yellow azo colorants.
• Textile Dye Manufacturing: Used to produce dyes for coloring synthetic and natural fibers, valued for color fastness and brightness.
• Inkjet and Printing Ink Formulation: Essential for creating pigments used in high-quality industrial and digital printing inks.
• Plastic and Polymer Coloring: Incorporated into masterbatches for coloring engineering plastics and polymers.
• Specialty Coatings and Paints: Used in formulations for automotive, industrial, and decorative coatings requiring stable and vibrant hues.
• Research and Chemical Synthesis: Employed in R&D laboratories for developing novel chromophores and functional dyes.

Basic Information

Product Name	2,5-Dichloro-4-[4,5-Dihydro-3-Methyl-5-Oxo-4-[[3-[(Phenylamino)Sulphonyl]Phenyl]Azo]-1H-Pyrazol-1-Yl]Benzenesulphonic Acid
CAS No.	91101-21-2
Molecular Formula	C22H17Cl2N5O5S2
Molecular Weight	566.43 g/mol
Synonyms	Benzenesulfonic acid, 2,5-dichloro-4-[4,5-dihydro-3-methyl-5-oxo-4-[[3-[(phenylamino)sulfonyl]phenyl]azo]-1H-pyrazol-1-yl]-; 91101-21-2; Azo dye intermediate 91101-21-2; 1H-Pyrazole-1-benzenesulfonic acid, 4,5-dihydro-3-methyl-5-oxo-4-[[3-[(phenylamino)sulfonyl]phenyl]azo]-2,5-dichloro-4-yl; 4-[4,5-Dihydro-3-methyl-5-oxo-4-(3-phenylaminosulfonylphenylazo)-1H-pyrazol-1-yl]-2,5-dichlorobenzenesulfonic acid
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. A Certificate of Analysis (COA) detailing all critical parameters is provided with each shipment to guarantee traceability and compliance.

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 strong acids and incompatible organic solvents. The container must be kept tightly sealed to protect the moisture-sensitive material.

Specification

Item	Specification
Appearance	Fine Powder
Color	Orange to Red
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual ≤ 0.5%, Total ≤ 1.5%

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