Description

7-[[4-[(4-Amino-3-sodiosulfophenyl)azo]-2-ethoxy-1-naphthalenyl]azo]-6-hydroxy-2-[3-[(2,4-dihydroxyphenyl)azo]phenyl]-1H-naphth[1,2-d]imidazole-8-sulfonic acid sodium salt is a high-performance, polyazo-based organic dye complex. This compound matters for its ability to provide intense, stable coloration across a range of demanding industrial substrates. It is primarily needed by manufacturers in the textile, leather, and specialty ink industries seeking advanced colorants.

Application

• Textile Dyeing: For dyeing natural and synthetic fibers, particularly where high color fastness is required.
• Leather Finishing: Used in the coloration of leather goods, providing rich, durable shades.
• Ink Manufacturing: As a key pigment for specialty printing inks, including inks for packaging and security applications.
• Paper Coloring: For the production of high-quality colored papers and paper products.
• Plastics and Polymers: As a colorant for certain engineering plastics and synthetic materials.
• Research & Development: Serves as a chemical intermediate or reference standard in the development of new dyes and pigments.

Basic Information

Item	Detail
Product Name	7-[[4-[(4-Amino-3-sodiosulfophenyl)azo]-2-ethoxy-1-naphthalenyl]azo]-6-hydroxy-2-[3-[(2,4-dihydroxyphenyl)azo]phenyl]-1H-naphth[1,2-d]imidazole-8-sulfonic acid sodium salt
CAS No.	6598-60-3
Molecular Formula	C49H33N9Na2O11S2
Molecular Weight	Contact for details
Synonyms	Acid Black 210; C.I. 300317; Leather Black D; Polyazo Black Dye; 1H-Naphth[1,2-d]imidazole-8-sulfonic acid derivative; Sodium 7-[[4-[(4-amino-3-sulfonatophenyl)azo]-2-ethoxy-1-naphthyl]azo]-6-hydroxy-2-[3-[(2,4-dihydroxyphenyl)azo]phenyl]-; Acid Leather Black 210; C.I. Acid Black 210
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Every batch is controlled against stringent specifications for identity, purity, and performance characteristics relevant to its application. Certificates of Analysis (COA) 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 90% (Dye Content)
Moisture (Karl Fischer)	≤ 5.0 %
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Ash Content	≤ 30 %

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