Description

5-[[[3-[[[4-[(2-Amino-8-Hydroxy-6-Sulfo-1-Naphthalenyl)Azo]-3-Sulfophenyl]Amino]Carbonyl]Phenyl]Amino]Sulfonyl]-2-Hydroxybenzoic Acid Trisodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple sulfonate and carboxylate groups, provides excellent solubility and binding properties for creating vivid and stable colorants. This compound is essential for manufacturers requiring precise and reliable dye synthesis for demanding technical applications. Its consistent quality is critical for ensuring batch-to-batch reproducibility in final product formulations.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton, wool, and nylon textiles.
• Production of Acid Dyes: Used in manufacturing acid dyes for coloring silk, leather, paper, and food-grade inks where strong color fastness is required.
• Specialty Pigment Synthesis: Serves as a precursor for creating complex organic pigments used in paints, coatings, and plastics.
• Laboratory & Research Chemical: Employed in R&D for developing new chromophores, studying azo dye chemistry, and analytical method development.
• Biological Staining Agent Precursor: Potential use in the synthesis of specialized stains for histological and microbiological applications.

Basic Information

Product Name	5-[[[3-[[[4-[(2-Amino-8-Hydroxy-6-Sulfo-1-Naphthalenyl)Azo]-3-Sulfophenyl]Amino]Carbonyl]Phenyl]Amino]Sulfonyl]-2-Hydroxybenzoic Acid Trisodium Salt
CAS No.	6358-55-0
Molecular Formula	C30H19N5O13S3Na3
Molecular Weight	863.66 g/mol
Synonyms	Benzoic acid, 5-[[[3-[[[4-[(2-amino-8-hydroxy-6-sulfo-1-naphthalenyl)azo]-3-sulfophenyl]amino]carbonyl]phenyl]amino]sulfonyl]-2-hydroxy-, trisodium salt; C.I. 27290; Acid Black 210; Trisodium 5-({3-[(4-{[2-amino-8-hydroxy-6-sulfo-1-naphthyl)hydrazinylidene]methyl}-3-sulfophenyl)carbamoyl]phenyl}sulfamoyl)-2-hydroxybenzoate; Reactive Black 5 precursor; Azo dye intermediate 6358-55-0.
EINECS	228-782-5

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure purity and consistency for industrial synthesis. Every batch is subjected to comprehensive analytical testing, including HPLC for purity and spectrophotometric analysis for color value and strength. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, moisture content, and heavy metal limits. We support compliance with global regulatory frameworks, including REACH.

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 nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect purity and handling properties. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (KF Titration)	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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