Description

4,4'-[Carbonylbis[Imino(3-Methoxy-4,1-Phenylene)Azo]]Bisbenzenesulfonic Acid is a specialized azo dye intermediate characterized by its sulfonic acid groups and complex 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 color fastness and compatibility with various substrates. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and durable colorants.

Application

• Primary intermediate for the synthesis of acid dyes and direct dyes used in textile coloring.
• Key building block in the production of reactive dyes for cotton and other cellulose fibers.
• Used in the manufacture of pigments and colorants for inks, including printing and packaging inks.
• Intermediate for specialty dyes applied in leather and paper industries.
• Potential use in the research and development of functional dyes for non-textile applications, such as sensors or imaging agents.

Basic Information

Product Name	4,4'-[Carbonylbis[Imino(3-Methoxy-4,1-Phenylene)Azo]]Bisbenzenesulfonic Acid
CAS No.	72102-80-8
Molecular Formula	C27H22N6O9S2
Molecular Weight	638.63 g/mol
Synonyms	4,4'-[Carbonylbis[imino(3-methoxy-4,1-phenylene)azo]]bis(benzenesulfonic acid); Benzenesulfonic acid, 4,4'-[carbonylbis[imino(3-methoxy-4,1-phenylene)azo]]bis-; C.I. 29100; Acid Dye Intermediate; Azo Dye Intermediate 72102-80-8; 4,4'-(Carbonylbis(imino(3-methoxy-4,1-phenylene)azo))dibenzenesulfonic acid
EINECS	Contact for details

Quality Control

Our production of 4,4'-[Carbonylbis[Imino(3-Methoxy-4,1-Phenylene)Azo]]Bisbenzenesulfonic Acid adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance as a dye intermediate. Certificates of Analysis (COA) detailing key 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 room temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided.

Specification

Item	Specification
Appearance	Brown to dark 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

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