Description

Trisodium 3-[[4-[[4-[(4-Aminophenyl)Azo]-6-Sulphonatonaphthyl]Azo]-6-Sulphonatonaphthyl]Azo]-4-Hydroxynaphthalene-1-Sulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex, multi-sulfonated structure provides excellent substantivity and chromophore properties, making it a critical precursor for synthesizing high-value dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, colorfast products.

Application

• Primary intermediate for the synthesis of azo dyes and pigments, particularly for textiles like cotton and wool.
• Key chromophore component in the production of reactive dyes and direct dyes for enhanced color strength and wash-fastness.
• Used in manufacturing specialty inks for packaging, security printing, and digital applications.
• Precursor for industrial colorants used in paper, leather, and plastic products.
• Employed in research and development of novel colorants and photonic materials.
• Potential use as a biological stain or histochemical marker in laboratory settings.

Basic Information

Item	Details
Product Name	Trisodium 3-[[4-[[4-[(4-Aminophenyl)Azo]-6-Sulphonatonaphthyl]Azo]-6-Sulphonatonaphthyl]Azo]-4-Hydroxynaphthalene-1-Sulphonate
CAS No.	3626-40-2
Molecular Formula	C40H23N7Na3O13S3
Molecular Weight	968.80 g/mol
Synonyms	Direct Black 19 (Parent Dye); 3-[[4-[[4-[(4-Aminophenyl)azo]-6-sulfo-1-naphthalenyl]azo]-6-sulfo-1-naphthalenyl]azo]-4-hydroxy-1-naphthalenesulfonic acid trisodium salt; Trisodium 3-[[4-[[4-[(4-aminophenyl)azo]-6-sulfonato-1-naphthyl]azo]-6-sulfonato-1-naphthyl]azo]-4-hydroxy-1-naphthalenesulfonate; C.I. 35255; Direct Black 19, trisodium salt; Azo Black; Direct Deep Black EW
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high chemical purity. Quality is verified through comprehensive analytical methods including HPLC, UV-Vis spectroscopy, and titration. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials. The product is hygroscopic; ensure the container is sealed after each use to minimize moisture absorption.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Water Solubility	Freely soluble

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