Description

7-[[[[6-[(o-Anisyl)Azo]-5-Hydroxy-7-Sulpho-2-Naphthyl]Amino]Carbonyl]Amino]-4-Hydroxy-3-[(2-Methyl-4-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid is a high-purity, complex azo dye intermediate essential for synthesizing vibrant and colorfast dyes and pigments. Its multi-sulfonated, poly-functional structure provides excellent water solubility and strong affinity for various substrates, making it a critical building block for advanced colorants. This compound is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance dyes.

Application

• Textile Dye Synthesis: A key precursor for manufacturing acid dyes and direct dyes used on nylon, silk, wool, and paper.
• Inkjet Ink Formulation: Used in the production of high-quality, water-soluble colorants for industrial and commercial printing inks.
• Leather Coloring: Serves as an intermediate for dyes applied in the leather tanning and finishing industry.
• Biological Staining: Potential use in the synthesis of histological stains for laboratory and diagnostic applications.
• Functional Dye Production: A building block for creating dyes with specific properties for optical data storage or liquid crystal displays (LCDs).
• Research & Development: Used in chemical research for developing novel chromophores and studying azo dye chemistry.

Basic Information

Product Name	7-[[[[6-[(o-Anisyl)Azo]-5-Hydroxy-7-Sulpho-2-Naphthyl]Amino]Carbonyl]Amino]-4-Hydroxy-3-[(2-Methyl-4-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid
CAS No.	25188-08-3
Molecular Formula	C36H27N7O13S3
Molecular Weight	885.82 g/mol
Synonyms	Acid Black 210; C.I. 28440; 7-[[[[6-[(2-Methoxyphenyl)azo]-5-hydroxy-7-sulfo-2-naphthalenyl]amino]carbonyl]amino]-4-hydroxy-3-[(2-methyl-4-sulfophenyl)azo]-2-naphthalenesulfonic acid; 2-Naphthalenesulfonic acid, 7-[[[[6-[(2-methoxyphenyl)azo]-5-hydroxy-7-sulfo-2-naphthalenyl]amino]carbonyl]amino]-4-hydroxy-3-[(2-methyl-4-sulfophenyl)azo]-; Azo Dye Intermediate 25188-08-3; Black 210
EINECS	Contact for details

Quality Control

Our production of 7-[[[[6-[(o-Anisyl)Azo]-5-Hydroxy-7-Sulpho-2-Naphthyl]Amino]Carbonyl]Amino]-4-Hydroxy-3-[(2-Methyl-4-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical composition. Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and solubility are available upon request 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 room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture. Keep away from strong acids and incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Solubility	Freely soluble
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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