Description

3,3'-(Carbonyldiimino)Bis[6-[[2-Oxo-1-[[(4-Sulfophenyl)Amino]Carbonyl]Propyl]Azo]Benzoic Acid]Tetrasodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its primary 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, and specialty ink industries seeking to produce vibrant and durable colorants.

Application

• Primary Intermediate for Reactive Dyes: A critical building block in the synthesis of high-performance reactive dyes used for coloring cotton, wool, and other cellulosic fibers.
• Direct Dye Production: Used in the manufacture of direct dyes for applications on paper, leather, and textiles where high substantivity is required.
• Specialty Ink Formulations: Serves as a colorant component in the production of inks for digital textile printing and other niche applications.
• Research & Development: Utilized in chemical R&D laboratories for developing novel chromophores and studying azo dye chemistry and properties.
• Industrial Pigment Synthesis: Acts as a precursor in the synthesis of certain complex organic pigments used in plastics and coatings.

Basic Information

Product Name	3,3'-(Carbonyldiimino)Bis[6-[[2-Oxo-1-[[(4-Sulfophenyl)Amino]Carbonyl]Propyl]Azo]Benzoic Acid]Tetrasodium Salt
CAS No.	72749-85-0
Molecular Formula	C34H24N8Na4O16S2
Molecular Weight	974.70 g/mol
Synonyms	Acid Red 337 (C.I. 17200); Tetrasodium 6,6'-[(Carbonylbis{imino[2-oxo-1-[(4-sulfonatophenyl)carbamoyl]ethylene]})]bis(azo)bis(3-hydroxybenzoate); Benzoic acid, 3,3'-(carbonyldiimino)bis[6-[[2-oxo-1-[[(4-sulfophenyl)amino]carbonyl]propyl]azo]-, tetrasodium salt; Reactive Dye Intermediate; Azo Dye Intermediate CAS 72749-85-0
EINECS	Contact for details

Quality Control

Our production of 3,3'-(Carbonyldiimino)Bis[6-[[2-Oxo-1-[[(4-Sulfophenyl)Amino]Carbonyl]Propyl]Azo]Benzoic Acid]Tetrasodium Salt adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity for industrial applications. All material is subjected to comprehensive analytical testing, including HPLC for purity and identity confirmation. Certificates of Analysis (COA) detailing specific lot results are provided with every shipment to support your quality assurance processes.

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 performance.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95.0%
Loss on Drying	Max. 5.0%
Sulfated Ash	20.0% - 25.0%
Heavy Metals (as Pb)	Max. 20 ppm
Water Solubility	Freely soluble

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