Description

4,4'-Bis(4-Amino-1-Naphthylazo)-2,2'-Stilbenedisulfonic Acid is a high-purity, functionalized azo dye intermediate characterized by its sulfonic acid groups and extended conjugated system. This compound is critical for synthesizing specialized dyes and pigments that require excellent lightfastness, water solubility, and strong chromophore properties. It is primarily sought after by manufacturers in the textile, ink, and advanced materials sectors for developing high-performance colorants.

Application

• Textile Dye Intermediate: A key precursor for synthesizing high-grade, wash-fast azo dyes for natural and synthetic fibers.
• Functional Ink Production: Used in the manufacture of colorants for inks requiring specific solubility and stability profiles.
• Liquid Crystal Dye (LCD) Synthesis: Serves as a building block for dichroic dyes used in display technologies.
• Analytical Chemistry Reagent: Employed as a chromogenic agent or complexometric indicator in specific analytical methods.
• Research & Development: Utilized in academic and industrial R&D for novel photonic and electronic material development.
• Specialty Pigment Manufacturing: Acts as an intermediate for creating complex organic pigments with enhanced properties.

Basic Information

Item	Details
Product Name	4,4'-Bis(4-Amino-1-Naphthylazo)-2,2'-Stilbenedisulfonic Acid
CAS No.	5463-64-9
Molecular Formula	C34H24N8O6S2
Molecular Weight	704.73 g/mol
Synonyms	Direct Blue 1 Intermediate; 4,4'-Bis[(4-amino-1-naphthyl)azo]-2,2'-stilbenedisulfonic Acid; C.I. 24410 Intermediate; Stilbene Azo Dye Intermediate; 2,2'-Stilbenedisulfonic acid, 4,4'-bis[(4-amino-1-naphthyl)azo]-; 5463-64-9; Direct Blue 1 precursor
EINECS	226-758-5

Quality Control

Every batch of 4,4'-Bis(4-Amino-1-Naphthylazo)-2,2'-Stilbenedisulfonic Acid is produced and tested under a strict quality management system. We ensure compliance with relevant industry standards through comprehensive analytical protocols, including HPLC for purity and identity confirmation. A detailed Certificate of Analysis (COA) documenting purity, assay, and impurity profiles is provided with each shipment to guarantee batch-to-batch consistency and traceability.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (Water)	Partially soluble, forms a colored solution

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