Description

Disodium 1,1'-Isopropylidenedi-p-Phenylene Bis[2-[[5-Amino-3-Methyl-1-(3-Sulphonatophenyl)-1H-Pyrazol-5-Yl]Azo]Benzenesulphonate] is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its core value lies in its role as a critical precursor for synthesizing high-performance, light-stable dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid and durable colors. Its specific molecular architecture provides excellent chromophore properties for advanced coloring applications.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-quality reactive dyes used in cotton and cellulose fiber dyeing.
• Textile Colorant Production: Manufacture of dyes for wool, silk, and nylon, offering good wash and light fastness.
• Inkjet Ink Formulations: Used in the production of pigments for high-resolution digital printing inks.
• Specialty Coatings and Paints: Imparts color and stability in industrial and automotive coating systems.
• Paper Coloring: Employed in the manufacture of dyes for high-grade paper and packaging materials.
• Research & Development: Serves as a standard or starting material in chemical research for novel chromophores and functional dyes.

Basic Information

Product Name	Disodium 1,1'-Isopropylidenedi-p-Phenylene Bis[2-[[5-Amino-3-Methyl-1-(3-Sulphonatophenyl)-1H-Pyrazol-5-Yl]Azo]Benzenesulphonate]
CAS No.	72828-69-4
Molecular Formula	C54H42N12Na2O14S4
Molecular Weight	~1221.22 g/mol
Synonyms	Bisphenol A based bis-azo dye intermediate; Reactive Black 5 precursor; C.I. Reactive Black 5 intermediate; Disodium 4,4'-(propane-2,2-diyl)bis(2-((5-amino-3-methyl-1-(3-sulfonatophenyl)-1H-pyrazol-4-yl)diazenyl)benzenesulfonate); 4,4'-(1-Methylethylidene)bis[2-[[5-amino-3-methyl-1-(3-sulfophenyl)-1H-pyrazol-4-yl]azo]benzenesulfonic acid] disodium salt; Azo dye intermediate 72828-69-4; Tetrasulfonated azo dye intermediate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, and elemental analysis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory compliance needs.

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). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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