Description

7-[(2,4-Diaminophenyl)azo]-7'-[[4-[[4-[(2,4-diaminophenyl)azo]phenyl]amino]-3-sodiosulfophenyl]azo]-1,8'-dihydroxy[2,2'-azobisnaphthalene]-3,6'-disulfonic acid disodium salt is a high-purity, complex azo dye intermediate essential for producing deep, vibrant colors. Its value lies in its ability to form strong covalent bonds with various substrates, resulting in excellent color fastness and light stability. This compound is a critical raw material for manufacturers in the textile, leather, and specialty ink industries seeking to develop high-performance dyes and pigments.

Application

• Primary Intermediate for Reactive Dyes: Synthesis of high-grade reactive dyes for coloring cotton, wool, and other cellulosic fibers.
• Leather Dyeing: Production of dyes for leather finishing, offering deep penetration and uniform coloration.
• Specialty Ink Formulation: Key component in manufacturing inks for security printing, packaging, and digital textiles.
• Paper Coloring: Used in the production of dyes for high-quality, colored paper and paperboard.
• Research & Development: Serves as a building block in chemical research for developing novel chromophores and functional materials.

Basic Information

Product Name	7-[(2,4-Diaminophenyl)azo]-7'-[[4-[[4-[(2,4-diaminophenyl)azo]phenyl]amino]-3-sodiosulfophenyl]azo]-1,8'-dihydroxy[2,2'-azobisnaphthalene]-3,6'-disulfonic acid disodium salt
CAS No.	6473-14-9
Molecular Formula	C44H30N12Na4O14S4
Molecular Weight	1238.06 g/mol
Synonyms	C.I. Reactive Black 5; Remazol Black B; Reactive Black 5; Levafix Black E-B; Procion Black H-EXL; Basilen Black P; Dianix Black BG-FS; Sumifix Supra Black B
EINECS	229-314-2

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and performance reliability. Every lot is analyzed for critical parameters including purity, hue, and strength. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment 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 strong oxidizing agents. The product is hygroscopic; ensure containers are sealed after use to minimize moisture absorption.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Ash Content	≤ 20.0%
Water Solubility	Conforms
Heavy Metals (as Pb)	≤ 20 ppm

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