Description

3-[[4-[[6-[(4-Aminobenzoyl)Amino]-1-Hydroxy-3-Sulfo-2-Naphtyl]Azo]-3,5-Dimethylphenyl]Azo]-1,5-Naphthalenedisulfonic Acid 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-value, colorfast dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vibrant and stable colors.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of reactive dyes for cotton, wool, and nylon, providing excellent wash and light fastness.
• Direct Dye Production: Used in manufacturing direct dyes for paper and textile applications, where its sulfonate groups ensure good solubility and affinity.
• Pigment Manufacturing: Serves as a precursor for lake pigments and other high-performance colorants used in inks, paints, and plastics.
• Biological Staining: Potential use in the development of specialized stains for histological and cytological applications in life sciences.
• Analytical Chemistry: Can be utilized as a chromogenic agent or indicator in specific analytical methods and test kits.
• Research & Development: A valuable compound for chemical R&D focused on novel dye structures, photonic materials, or molecular sensors.

Basic Information

Item	Detail
Product Name	3-[[4-[[6-[(4-Aminobenzoyl)Amino]-1-Hydroxy-3-Sulfo-2-Naphtyl]Azo]-3,5-Dimethylphenyl]Azo]-1,5-Naphthalenedisulfonic Acid Trisodium Salt
CAS No.	6421-66-5
Molecular Formula	C35H25N6Na3O11S3
Molecular Weight	894.76 g/mol
Synonyms	Trisodium 3-[[4-[[6-[(4-aminobenzoyl)amino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]-3,5-dimethylphenyl]azo]naphthalene-1,5-disulphonate; C.I. 34215; Acid Black 107; Azo Black; 1,5-Naphthalenedisulfonic acid, 3-[[4-[[6-[(4-aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]-3,5-dimethylphenyl]azo]-, trisodium salt; 6421-66-5; Trisodium 3-((4-((6-((4-aminobenzoyl)amino)-1-hydroxy-3-sulphonatonaphthalen-2-yl)diazenyl)-3,5-dimethylphenyl)diazenyl)naphthalene-1,5-disulphonate
EINECS	Contact for details

Quality Control

Our production of 3-[[4-[[6-[(4-Aminobenzoyl)Amino]-1-Hydroxy-3-Sulfo-2-Naphtyl]Azo]-3,5-Dimethylphenyl]Azo]-1,5-Naphthalenedisulfonic Acid Trisodium Salt adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance as a dye intermediate. Comprehensive Certificates of Analysis (COA) detailing purity, impurity profile, and physical specifications are provided to guarantee supply chain transparency and reliability.

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 compound is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	Contact for details
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.