Description

3,3'-(Carbonyldiimino)Bis[6-[[1-[[(2-Methoxy-5-Sulfophenyl)Amino]Carbonyl]-2-Oxopropyl]Azo]Benzoic Acid]Tetrasodium Salt is a high-purity, water-soluble azo dye intermediate with a complex, functionalized structure designed for demanding synthetic applications. Its value lies in its role as a precise building block for creating specialized dyes and pigments with enhanced color fastness and specific chemical properties. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries who require consistent, high-quality intermediates for advanced colorant production.

Application

• Primary Intermediate for Reactive Dyes: A key precursor in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers.
• Specialty Pigment Manufacturing: Used in the production of complex organic pigments for inks, coatings, and plastics requiring specific hue and stability.
• Functional Dye Synthesis: Serves as a building block for dyes with specialized applications, such as those used in biological staining or laser applications.
• Research & Development: A valuable compound for chemical R&D labs exploring new chromophores and dye-polymer interactions.
• Textile Chemical Production: Integral to formulating advanced dyeing auxiliaries and color-fixing agents.

Basic Information

Product Name	3,3'-(Carbonyldiimino)Bis[6-[[1-[[(2-Methoxy-5-Sulfophenyl)Amino]Carbonyl]-2-Oxopropyl]Azo]Benzoic Acid]Tetrasodium Salt
CAS No.	72749-83-8
Molecular Formula	C38H28N8Na4O16S2
Molecular Weight	1010.77 g/mol (approx.)
Synonyms	Reactive Dye Intermediate 72749-83-8; Tetrasodium 3,3'-(carbonylbis(azanediyl))bis(6-((1-((2-methoxy-5-sulfophenyl)carbamoyl)-2-oxopropyl)diazenyl)benzoate); C.I. Reactive Yellow; Azo Dye Intermediate YS; Benzoic acid, 3,3'-(carbonylbis(imino))bis(6-((1-((2-methoxy-5-sulfophenyl)amino)carbonyl)-2-oxopropyl)azo)-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Every lot is analyzed using modern analytical techniques including HPLC and spectrophotometry to verify identity, strength, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all relevant specifications is provided with each shipment 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 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.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	15.0 - 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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