Description

Disodium Dihydrogen 4,4'-Bis[[5-[[5-(Aminosulphonyl)-2-Hydroxyphenyl]Azo]-1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo][1,1'-Biphenyl]-3,3'-Dicarboxylate is a high-purity, complex azo dye intermediate of significant industrial importance. This compound is valued for its role as a key precursor in the synthesis of high-performance dyes and pigments, offering excellent color properties and structural stability. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid and durable colorants.

Application

• Primary Intermediate for Reactive Dyes: A critical building block in the manufacture of high-grade reactive dyes for cotton and other cellulosic fibers.
• Pigment Synthesis: Used in the production of organic pigments for applications in plastics, masterbatches, and industrial coatings.
• Inkjet Inks: Serves as a precursor for dyes used in high-quality digital and textile printing inks.
• Leather Dyeing: Employed in the synthesis of dyes for the leather tanning and finishing industry.
• Paper Coloring: Used in the development of dyes for specialty paper and packaging materials.
• Research & Development: A valuable compound for R&D laboratories focusing on novel chromophores and advanced material science.

Basic Information

Product Name	Disodium Dihydrogen 4,4'-Bis[[5-[[5-(Aminosulphonyl)-2-Hydroxyphenyl]Azo]-1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo][1,1'-Biphenyl]-3,3'-Dicarboxylate
CAS No.	72939-54-9
Molecular Formula	C68H42N12Na2O22S4
Molecular Weight	Approx. 1590.4 g/mol
Synonyms	4,4'-Bis[[5-[[5-(Aminosulphonyl)-2-hydroxyphenyl]azo]-1-hydroxy-6-(phenylamino)-3-sulphonato-2-naphthyl]azo]biphenyl-3,3'-dicarboxylic acid, disodium salt; C.I. Reactive Black 5 Intermediate; Disodium 4,4'-bis[[5-[[5-(aminosulfonyl)-2-hydroxyphenyl]azo]-1-hydroxy-6-(phenylamino)-3-sulfonato-2-naphthyl]azo]biphenyl-3,3'-dicarboxylate; Reactive Dye Intermediate 72939-54-9; Tetrasulfonated Bisazo Dye Intermediate; CAS 72939-54-9
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, and elemental analysis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory 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). This material is hygroscopic (moisture-sensitive) and light-sensitive; containers must be kept tightly sealed after opening to prevent degradation from moisture and light exposure.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content (KF)	≤ 5.0%
Sulfated Ash	≤ 20.0%
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.