Description

3-Hydroxy-4-[[4-[(4-Sodiosulfophenyl)Azo]-1-Naphthalenyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its primary value lies in its role as a key precursor for synthesizing a range of vivid and stable dyes and pigments, particularly for textiles and inks. This compound is essential for manufacturers and R&D laboratories in the dye, pigment, and specialty chemical industries seeking reliable intermediates for colorant production.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes, direct dyes, and reactive dyes for textile fibers like wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of high-performance organic pigments for inks, plastics, and coatings, offering excellent color strength.
• Specialty Colorants: Employed in the formulation of specialized colorants for leather, paper, and food packaging inks where specific color properties are required.
• Research & Development: A valuable compound for chemical research focused on developing new chromophores, dye-sensitized solar cells (DSSCs), or functional materials.
• Analytical Reagents: Can be utilized as a staining agent or a colorimetric indicator in certain laboratory and diagnostic applications.

Basic Information

Product Name	3-Hydroxy-4-[[4-[(4-Sodiosulfophenyl)Azo]-1-Naphthalenyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt
CAS No.	6226-83-1
Molecular Formula	C26H16N4Na2O10S3
Molecular Weight	694.57 g/mol
Synonyms	Acid Black 210; C.I. 28440; 3-Hydroxy-4-[(4-[(4-sulfophenyl)azo]-1-naphthyl)azo]naphthalene-2,7-disulfonic acid disodium salt; 1-Naphthalenesulfonic acid, 3-hydroxy-4-((4-((4-sulfophenyl)azo)-1-naphthalenyl)azo)-, disodium salt; Disodium 3-hydroxy-4-[(E)-[4-[(E)-(4-sulfonatophenyl)diazenyl]naphthalen-1-yl]diazenyl]naphthalene-2,7-disulfonate; Azo Dye Intermediate 6226-83-1
EINECS	228-320-6

Quality Control

Our production of 3-Hydroxy-4-[[4-[(4-Sodiosulfophenyl)Azo]-1-Naphthalenyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for color value, and wet chemistry methods, to ensure it meets exacting specifications for dye intermediate applications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are provided with every shipment to guarantee traceability and consistency for our global B2B clients.

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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	Max. 20 ppm
Sulfated Ash	Conforms

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