Description

Tetrasodium 7,7'-(Carbonyldiimino)Bis[3-[(4-Ethoxy-3-Sulphonatophenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonate] is a high-purity, water-soluble azo dye intermediate and complexing agent of significant industrial importance. This compound is valued for its strong chelating properties and its role as a key precursor in the synthesis of specialized dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing colorants with enhanced stability and performance.

Application

• Primary Intermediate for Reactive and Direct Dyes: A crucial building block in the synthesis of high-quality azo dyes for cotton, wool, and nylon.
• Specialty Ink Formulations: Used in the production of pigments for inks in packaging, textiles, and digital printing applications.
• Metal Complex Dye Synthesis: Serves as a ligand to create metallized dyes, which offer superior light and wash fastness.
• Laboratory Reagent: Employed in research and development for studying azo coupling reactions and chelation chemistry.
• Analytical Chemistry: Potential use as a colorimetric indicator or complexometric agent in specific analytical methods.

Basic Information

Product Name	Tetrasodium 7,7'-(Carbonyldiimino)Bis[3-[(4-Ethoxy-3-Sulphonatophenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonate]
CAS No.	83763-82-0
Molecular Formula	C44H30N6Na4O19S4
Molecular Weight	~1190.0 g/mol
Synonyms	Acid Black 194; C.I. 20265; Tetrasodium 4,4'-carbonylbis[(7-hydroxy-8-[(4-ethoxy-3-sulfophenyl)azo]-1-naphthalenesulfonate)]; 7,7'-(Carbonyldiimino)bis[4-hydroxy-3-[(4-ethoxy-3-sulfophenyl)azo]-2-naphthalenesulfonic acid] tetrasodium salt; C.I. Acid Black 194; Azo Black 194; Reactive Black precursor
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 7,7'-(Carbonyldiimino)Bis[3-[(4-Ethoxy-3-Sulphonatophenyl)Azo]-4-Hydroxynaphthalene-2-Sulphonate] adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure consistent purity, chemical identity, and performance characteristics. Comprehensive Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are available upon request 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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