Description

4-Amino-6-[(6-Amino-2-Hydroxy-4-Sulpho-1-Naphthyl)Azo]-5-Hydroxynaphthalene-1,3-Disulphonic Acid is a high-purity, polyfunctional azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple sulphonic acid groups and amino functionalities, makes it a versatile precursor for synthesizing specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical sectors requiring precise colorants with specific fastness and solubility properties.

Application

• Primary Intermediate for Azo Dyes: Key building block for the synthesis of acid dyes, direct dyes, and reactive dyes used in textile coloring.
• Specialty Pigment Manufacturing: Used in the production of high-performance pigments for inks, coatings, and plastics where color stability is critical.
• Biological Staining Reagents: Serves as a precursor for certain histochemical stains and indicators used in laboratory diagnostics and research.
• Chemical Research & Development: Valuable intermediate for organic synthesis and the development of new functional dyes and chromophores.
• Paper Coloring: Employed in the manufacture of dyes for specialty paper products.
• Laser Dye & Functional Material Synthesis: Potential use in the development of materials for optical applications and advanced functional polymers.

Basic Information

Product Name	4-Amino-6-[(6-Amino-2-Hydroxy-4-Sulpho-1-Naphthyl)Azo]-5-Hydroxynaphthalene-1,3-Disulphonic Acid
CAS No.	23554-16-7
Molecular Formula	C₂₀H₁₆N₄O₁₁S₃
Molecular Weight	608.56 g/mol
Synonyms	Acid Black 234 Intermediate; C.I. 26370; 1,3-Naphthalenedisulfonic acid, 4-amino-6-[(6-amino-2-hydroxy-4-sulfo-1-naphthalenyl)azo]-5-hydroxy-; 4-Amino-5-hydroxy-6-[(6-amino-2-hydroxy-4-sulfo-1-naphthyl)azo]naphthalene-1,3-disulfonic acid; 6-Amino-4-hydroxy-5-[(6-amino-2-hydroxy-4-sulfo-1-naphthyl)azo]naphthalene-1,3-disulfonic acid; Azo Dye Intermediate 23554-16-7; Black 234 Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of 4-Amino-6-[(6-Amino-2-Hydroxy-4-Sulpho-1-Naphthyl)Azo]-5-Hydroxynaphthalene-1,3-Disulphonic Acid adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) detailing all critical parameters are provided with every shipment to guarantee traceability and compliance with your quality standards.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use 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% (Typical 97-99%)
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble in water

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