Description

Benzoic acid, 2-[[2-amino-5-hydroxy-6-[[4'-[[1-hydroxy-8-[[(4-methylphenyl)sulfonyl]amino]-3,6-disulfo-2-naphthalenyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-7-sulfo-1-naphthalenyl]azo]-5-nitro-, trisodium salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex polyazo structure, featuring multiple sulfonate groups, makes it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, wash-fast colors.

Application

• Textile Dyeing: Primary application as a key intermediate for the synthesis of reactive, direct, and acid dyes for cotton, wool, silk, and nylon.
• Ink Manufacturing: Used in the production of high-quality pigments for printing inks, including those for packaging and security printing.
• Leather Coloring: Serves as an intermediate for dyes applied in the leather tanning and finishing industry.
• Paper Coloring: Employed in the manufacture of dyes for coloring paper and paperboard products.
• Specialty Coatings: A precursor for pigments used in industrial and automotive paints requiring specific color fastness and stability.
• Biological Staining: Potential use as an intermediate for histological stains and indicators in laboratory settings.

Basic Information

Product Name	Benzoic acid, 2-[[2-amino-5-hydroxy-6-[[4'-[[1-hydroxy-8-[[(4-methylphenyl)sulfonyl]amino]-3,6-disulfo-2-naphthalenyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-7-sulfo-1-naphthalenyl]azo]-5-nitro-, trisodium salt
CAS No.	75522-94-0
Molecular Formula	C58H38N9Na3O22S4
Molecular Weight	Approx. 1380.2 g/mol (Contact for exact details)
Synonyms	2-[[2-Amino-5-hydroxy-6-[[4'-[[1-hydroxy-8-[[(4-methylphenyl)sulfonyl]amino]-3,6-disulfo-2-naphthalenyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-7-sulfo-1-naphthalenyl]azo]-5-nitrobenzoic acid trisodium salt; Polyazo dye intermediate; Trisodium 2-[(2-amino-5-hydroxy-6-{[4'-({1-hydroxy-8-[(4-methylphenyl)sulfonyl]amino-3,6-disulfo-2-naphthyl}azo)-3,3'-dimethoxybiphenyl-4-yl]azo}-7-sulfo-1-naphthyl)azo]-5-nitrobenzoate; CI 34200 (related); Azo dye precursor, sulfonated.
EINECS	Contact for details

Quality Control

Our Benzoic acid, 2-[[2-amino-5-hydroxy-6-[[4'-[[1-hydroxy-8-[[(4-methylphenyl)sulfonyl]amino]-3,6-disulfo-2-naphthalenyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-7-sulfo-1-naphthalenyl]azo]-5-nitro-, trisodium salt is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and consistent performance in downstream synthesis. Certificates of Analysis (COA) documenting purity, heavy metal content, and other critical parameters are available upon request.

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); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Contact for specific grade)
Water Content (KF)	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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