Description

Disodium 3,3'-[Sulphonylbis[p-Phenyleneazo(5-Imino-3-Methyl-1H-Pyrazole-4,1-Diyl)]]Bis(Benzenesulphonate) is a high-purity, water-soluble synthetic dye intermediate belonging to the class of bis-azo pyrazolone compounds. This compound is valued for its ability to impart bright, stable colorations and is a critical precursor in the synthesis of specialized dyes and pigments. It is primarily sought by manufacturers in the textile, ink, and specialty coatings industries for producing high-performance colorants.

Application

• Textile Dyeing: As a key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of pigments for high-quality printing inks, including inks for packaging and security applications.
• Specialty Coatings: Serves as a colorant precursor in industrial and automotive coatings requiring specific hue and lightfastness properties.
• Paper Coloring: Employed in the manufacture of dyes for coloring high-grade papers and paper products.
• Biological Staining: Potential use as an intermediate for developing stains used in histological and microbiological applications.
• Functional Dyes: A building block for dyes used in optical data storage, liquid crystal displays (LCDs), and other advanced material science applications.

Basic Information

Product Name	Disodium 3,3'-[Sulphonylbis[p-Phenyleneazo(5-Imino-3-Methyl-1H-Pyrazole-4,1-Diyl)]]Bis(Benzenesulphonate)
CAS No.	71033-19-7
Molecular Formula	C34H24N10Na2O10S3
Molecular Weight	882.78 g/mol
Synonyms	Disodium 3,3'-[sulfonylbis(4,1-phenyleneazo)]bis[5-imino-1-methyl-1H-pyrazole-4-sulfonate]; C.I. Reactive Yellow 160; Reactive Yellow 160; Bisazo pyrazolone dye intermediate; 3,3'-[Sulfonylbis(4,1-phenyleneazo)]bis[5-imino-1-methyl-1H-pyrazole-4-sulfonic acid] disodium salt; 71033-19-7; Disodium 3,3'-[sulphonylbis(4,1-phenyleneazo)]bis(5-imino-1-methyl-1H-pyrazole-4-sulphonate)
EINECS	Contact for details

Quality Control

Our Disodium 3,3'-[Sulphonylbis[p-Phenyleneazo(5-Imino-3-Methyl-1H-Pyrazole-4,1-Diyl)]]Bis(Benzenesulphonate) is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and solubility are provided to guarantee compliance with your technical specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials and sources of heat. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided.

Specification

Item	Specification
Appearance	Yellow to orange-red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Solubility (in Water)	Clear solution at 1%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm

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