Description

2-[(8-Amino-1-Hydroxy-3,6-Disulpho-2-Naphthyl)Azo]Naphthalene-1,5-Disulphonic Acid is a high-purity, polyfunctional azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple sulphonic acid groups and an azo linkage, makes it a critical precursor for synthesizing specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid, colorfast products with specific technical properties.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-quality reactive dyes used in cotton and cellulose fiber dyeing and printing.
• Specialty Pigment Synthesis: Used in the manufacture of complex organic pigments for inks, coatings, and plastics requiring high color strength and stability.
• Food Colorant Precursor: Serves as an intermediate in the production of certain certified food colorants (where final product meets strict purity standards).
• Laboratory Reagent & Analytical Standard: Employed in research and quality control laboratories as a standard for dye chemistry studies and analytical method development.
• Functional Dye Manufacturing: Precursor for dyes used in specialized applications such as sensitizers for solar cells or indicators.

Basic Information

Product Name	2-[(8-Amino-1-Hydroxy-3,6-Disulpho-2-Naphthyl)Azo]Naphthalene-1,5-Disulphonic Acid
CAS No.	57583-83-2
Molecular Formula	C₂₀H₁₄N₄O₁₃S₄
Molecular Weight	678.60 g/mol
Synonyms	Acid Black 234 Intermediate; 1,5-Naphthalenedisulfonic acid, 2-[(8-amino-1-hydroxy-3,6-disulfo-2-naphthalenyl)azo]-; C.I. 31755; 8-Amino-1-hydroxy-3,6-disulfo-2-naphthylazo-1,5-naphthalenedisulfonic acid; 2-(8-Amino-1-hydroxy-3,6-disulfo-2-naphthylazo)-1,5-naphthalenedisulfonic acid; Azo dye intermediate 57583-83-2
EINECS	Contact for details

Quality Control

Our production of 2-[(8-Amino-1-Hydroxy-3,6-Disulpho-2-Naphthyl)Azo]Naphthalene-1,5-Disulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet the precise specifications required for high-performance dye synthesis. A Certificate of Analysis (COA) detailing all critical parameters is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept 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%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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