Description

Disodium 4,4'-[Carbonylbis[Imino[2-[(2-Hydroxyacetyl)Amino]-4,1-Phenylene]Azo]]Bis[Toluene-2-Sulphonate] is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing reactive and direct dyes, offering excellent color strength and binding properties. This compound is essential for manufacturers in the textile, leather, paper, and specialty ink industries seeking to produce vibrant and durable colorants.

Application

• Primary Intermediate for Reactive Dyes: A crucial building block in the synthesis of reactive dyes for cotton, wool, and nylon, providing excellent wash-fastness.
• Direct Dye Production: Used in the manufacture of direct dyes for coloring paper, leather, and cellulosic fibers without the need for a mordant.
• Specialty Ink Formulations: Serves as a colorant component in high-performance inks for digital textile printing and other niche applications.
• Biological Staining: Potential use as a staining agent in histology and microbiology due to its specific chromogenic properties.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo dye chemistry and photostability.
• Industrial Pigment Synthesis: Acts as an intermediate in the production of certain lake pigments and colorants for plastics.

Basic Information

Product Name	Disodium 4,4'-[Carbonylbis[Imino[2-[(2-Hydroxyacetyl)Amino]-4,1-Phenylene]Azo]]Bis[Toluene-2-Sulphonate]
CAS No.	72828-84-3
Molecular Formula	C34H28N8Na2O12S2
Molecular Weight	858.73 g/mol
Synonyms	Disodium 4,4'-[carbonylbis[imino(2-acetylamino-4,1-phenylene)azo]]di(toluene-2-sulphonate); C.I. Reactive Red 238; Reactive Red 238; Disodium 4,4'-[carbonylbis[imino[2-[(2-hydroxyacetyl)amino]-4,1-phenylene]azo]]bis(toluene-2-sulphonate); 4,4'-[Carbonylbis[imino[2-[(2-hydroxyacetyl)amino]-4,1-phenylene]azo]]bis[toluene-2-sulfonic acid] disodium salt; C.I. 182155; Azo dye intermediate 72828-84-3
EINECS	Contact for details

Quality Control

Our Disodium 4,4'-[Carbonylbis[Imino[2-[(2-Hydroxyacetyl)Amino]-4,1-Phenylene]Azo]]Bis[Toluene-2-Sulphonate] is produced under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation (IR, UV-Vis), to ensure it meets exacting specifications for dye intermediate applications. Certificates of Analysis (COA) documenting purity, impurity profile, and physical properties are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0% (Area %)
Water Content (KF)	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Complete, clear solution
pH (1% Aqueous Solution)	6.0 - 8.0

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