Description

Diammonium 4,4'-[1,3-Phenylenebis[Azo(4,6-Diamino-3,1-Phenylene)Azo]]Bis(Benzenesulphonate) is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its primary value lies in its role as a key precursor for synthesizing complex, high-performance dyes and pigments, particularly those requiring excellent lightfastness and color strength. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant and durable colorants. We supply this material with a focus on consistent quality and reliable global supply chains to meet stringent production requirements.

Application

This specialized azo compound serves as a critical building block in advanced colorant manufacturing. Its primary and derived applications include:

• Primary Intermediate for Reactive Dyes: Synthesis of high-grade reactive dyes for cotton and cellulose fiber dyeing and printing.
• Production of Direct Dyes: Manufacturing of direct dyes used for paper coloring and textile applications.
• Specialty Pigment Synthesis: Key precursor in the production of high-performance organic pigments for inks and plastics.
• Functional Dye Manufacturing: Used in creating dyes for leather, and potentially in the formulation of dyes for security inks or other functional applications.
• Research & Development: Serves as a standard or starting material in chemical R&D for novel chromophore systems.

Basic Information

Product Name	Diammonium 4,4'-[1,3-Phenylenebis[Azo(4,6-Diamino-3,1-Phenylene)Azo]]Bis(Benzenesulphonate)
CAS No.	85587-35-5
Molecular Formula	C30H28N10O6S2 · 2NH3 (or C30H34N12O6S2)
Molecular Weight	722.81 g/mol (for C30H34N12O6S2)
Synonyms	4,4'-[1,3-Phenylenebis[azo(4,6-diamino-3,1-phenylene)azo]]bis(benzenesulfonic acid), diammonium salt; Diammonium 4,4'-(1,3-phenylenebis(azo))bis(4,6-diamino-1,3-phenylene)azo))dibenzenesulfonate; Azo dye intermediate 85587-35-5; C.I. Direct Brown 202 (related); Benzenesulfonic acid, 4,4'-[1,3-phenylenebis[azo(4,6-diamino-1,3-phenylene)azo]]bis-, diammonium salt; Direct Brown 202, diammonium salt form
EINECS	Contact for details

Quality Control

Our production of Diammonium 4,4'-[1,3-Phenylenebis[Azo(4,6-Diamino-3,1-Phenylene)Azo]]Bis(Benzenesulphonate) adheres to rigorous quality control protocols to ensure batch-to-batch consistency and purity suitable for industrial synthesis. Quality is verified through analytical methods including HPLC, UV-Vis spectroscopy, and titration. A detailed Certificate of Analysis (COA) documenting identity, assay, impurity profile, and physical properties is provided with each shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect purity and handling properties.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content (KF)	≤ 5.0%
Solubility (1% in Water)	Complete, clear solution
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.