Description

2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-, diazotized, coupled with 2,4-diaminobenzenesulfonic acid, diazotized 5-amino-2-[(4-aminophenyl)amino]benzenesulfonic acid and m-phenylenediamine, sodium salts is a complex, high-purity azo dye intermediate essential for producing vibrant and colorfast pigments. Its precise chemical structure enables the creation of specific, stable hues critical for demanding industrial applications. This product is primarily needed by manufacturers in the textile dyeing, ink formulation, and specialty coatings industries where consistent color quality is paramount.

Application

• Primary Intermediate for Azo Dyes and Pigments: Serves as a key building block in the synthesis of high-performance azo dyes used in textile coloration.
• Textile Dyeing and Printing: Used to formulate dyes for cotton, wool, silk, and synthetic fibers, offering good wash and light fastness.
• Ink Manufacturing: Employed in the production of industrial inks for packaging, printing, and writing instruments.
• Specialty Coatings and Paints: Imparts specific color properties to coatings where chemical resistance is required.
• Leather Dyeing: Used in the processing and coloring of leather goods.
• Paper Coloring: Applied in the manufacture of colored papers and paper products.
• Research & Development: Serves as a standard or reagent in chemical research for developing new colorants and studying azo chemistry.

Basic Information

Product Name	2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-, diazotized, coupled with 2,4-diaminobenzenesulfonic acid, diazotized 5-amino-2-[(4-aminophenyl)amino]benzenesulfonic acid and m-phenylenediamine, sodium salts
CAS No.	90459-20-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Acid Black 234; Acid Black 234; Sodium salt of Acid Black 234; Azo dye intermediate 90459-20-4; Black 234; 6-Amino-4-hydroxy-2-naphthalenesulfonic acid, diazotized, coupled deriv.; Diazotized coupled naphthalenesulfonic acid-aminobenzenesulfonic acid-phenylenediamine sodium salt
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity for reliable downstream synthesis. Quality is verified through advanced analytical techniques including HPLC and spectrophotometry. A comprehensive 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, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep container tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Ash Content	Max. 20.0%
Water Solubility	Conforms
Heavy Metals (as Pb)	Max. 20 ppm

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