Description

Sodium 2,6-Bis[(2,4-Diaminophenyl)Azo]Toluene-4-Sulphonate is a high-purity, synthetic azo dye intermediate of significant commercial importance. Its value lies in its role as a critical precursor for producing specialized dyes and pigments, offering consistent quality and performance for demanding industrial applications. This compound is essential for manufacturers in the textile, leather, and specialty chemical industries seeking reliable intermediates for colorant synthesis.

Application

• Primary intermediate for the synthesis of azo dyes and pigments used in textile coloring.
• Key precursor in manufacturing dyes for leather finishing and tanning processes.
• Used in the production of specialized colorants for paper and pulp applications.
• Intermediate for creating research chemicals and analytical reagents.
• Potential use in the formulation of inks and other specialty coatings.
• Serves as a building block for functional dyes with specific optical or electronic properties.

Basic Information

Product Name	Sodium 2,6-Bis[(2,4-Diaminophenyl)Azo]Toluene-4-Sulphonate
CAS No.	6441-66-3
Molecular Formula	C26H22N8NaO3S
Molecular Weight	549.57 g/mol
Synonyms	2,6-Bis[(2,4-diaminophenyl)azo]-4-methylbenzenesulfonic acid sodium salt; Sodium 2,6-bis[(2,4-diaminophenyl)diazenyl]-4-methylbenzenesulfonate; 4-Methyl-2,6-bis[(2,4-diaminophenyl)azo]benzenesulfonic acid sodium salt; Azo dye intermediate 6441-66-3; Bis-azo diamine sulfonate sodium salt; C.I. 37250; Leather Brown D intermediate; Textile dye precursor 6441-66-3.
EINECS	Contact for details

Quality Control

Our Sodium 2,6-Bis[(2,4-Diaminophenyl)Azo]Toluene-4-Sulphonate is manufactured under strict quality protocols to ensure batch-to-batch consistency and high purity suitable for industrial synthesis. The product undergoes rigorous analytical testing, including chromatography and spectroscopic methods. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request to support your quality assurance and regulatory needs.

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 tightly sealed after opening to prevent degradation from atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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