Description

Disodium 2-[[4-[[2,4-Diamino-5-[(2-Hydroxy-5-Sulphonatophenyl)Azo]Phenyl]Azo]Phenyl]Amino]-5-Nitrobenzenesulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a critical precursor for synthesizing specialized dyes and pigments, particularly in applications demanding high color strength and specific hue properties. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries who require reliable, consistent-quality intermediates for their production processes.

Application

• Primary intermediate for the synthesis of acid dyes and direct dyes used in textile coloration, especially for nylon, wool, and silk.
• Key building block in the production of pigments for inks, including packaging and security inks.
• Used in the manufacture of colorants for specialty coatings and industrial finishes.
• Potential intermediate for biological stains and histochemical dyes in laboratory settings.
• Research and development of novel functional dyes for optical or electronic applications.
• Starting material for custom synthesis of dyes with specific lightfastness and washfastness properties.

Basic Information

Product Name	Disodium 2-[[4-[[2,4-Diamino-5-[(2-Hydroxy-5-Sulphonatophenyl)Azo]Phenyl]Azo]Phenyl]Amino]-5-Nitrobenzenesulphonate
CAS No.	84521-99-3
Molecular Formula	C24H18N8Na2O10S2
Molecular Weight	680.55 g/mol
Synonyms	Acid Black 210; C.I. 28440; Disodium 5-[(E)-[4-[(E)-[2,4-diamino-5-[(E)-2-hydroxy-5-sulfonatophenyl]diazenyl]phenyl]diazenyl]phenyl]amino-2-nitrobenzenesulfonate; 2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-5-[[7-sulfo-4-[(4-sulfophenyl)azo]-1-naphthalenyl]azo]-, disodium salt; Benzenesulfonic acid, 2-[[4-[[2,4-diamino-5-[(2-hydroxy-5-sulfophenyl)azo]phenyl]azo]phenyl]amino]-5-nitro-, disodium salt; Azo dye intermediate 84521-99-3
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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