Description

3,3'-[Carbonylbis[(Imino-4,1-Phenylene)Azo]]Bis(Benzenesulfonic Acid) is a specialized azo dye intermediate characterized by its sulfonated aromatic structure. This compound matters for its role as a key precursor in the synthesis of high-value, water-soluble dyes and pigments, offering excellent chromophore properties. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries seeking to produce vibrant and stable colorants. Its functional groups make it a versatile building block for advanced material science applications.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial precursor in the manufacturing of acid dyes, direct dyes, and reactive dyes for textiles like wool, silk, and nylon.
• Pigment Synthesis: Used in the production of organic pigments for inks, coatings, and plastics, providing enhanced color strength and dispersion.
• Biological Staining Agent: Potential application in the formulation of histological stains and indicators in laboratory diagnostics.
• Functional Material Research: Acts as a monomer or additive in the development of advanced polymeric materials, sensors, and light-harvesting complexes.
• Paper Coloring: Employed in the production of specialty papers requiring high color fastness and brightness.
• Leather Dyeing: Suitable for dyeing leather goods, offering good penetration and color uniformity.

Basic Information

Product Name	3,3'-[Carbonylbis[(Imino-4,1-Phenylene)Azo]]Bis(Benzenesulfonic Acid)
CAS No.	34375-33-2
Molecular Formula	C26H20N6O7S2
Molecular Weight	592.60 g/mol
Synonyms	Acid Yellow 219; C.I. 13915; 3,3'-(Carbonylbis(imino-4,1-phenylene)azo)bis(benzenesulfonic acid); Benzenesulfonic acid, 3,3'-[carbonylbis[(imino-4,1-phenylene)azo]]bis-; 4,4'-Diaminoazobenzene-3,3'-dicarboxylic acid bis(benzenesulfonic acid) derivative; Azo dye intermediate 34375-33-2; Direct Yellow 4GL; Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our production of 3,3'-[Carbonylbis[(Imino-4,1-Phenylene)Azo]]Bis(Benzenesulfonic Acid) adheres to stringent quality protocols to ensure batch-to-batch consistency and purity for industrial applications. All materials undergo rigorous analytical testing, including HPLC for assay and impurity profiling. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and physical specifications 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/59-77°F). Keep away from strong acids and incompatible organic solvents. The product is light-sensitive; prolonged exposure to light should be avoided to prevent degradation.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Clear, yellow solution

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