Description

4,5-Dihydroxy-3-[[2-Ethoxy-4-[(8-Sodiosulfo-2-Naphthalenyl)Azo]-1-Naphthalenyl]Azo]Naphthalene-1-Sulfonic Acid Sodium Salt is a high-purity, synthetic azo dye intermediate known for its complex polycyclic structure and functional sulfonic acid groups. This compound is valued for its ability to impart specific color properties and act as a key building block in the synthesis of advanced dyes and pigments. It is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: A critical precursor in the synthesis of high-value, water-soluble azo dyes for textiles and fibers.
• Specialty Ink Formulation: Used in the production of inks for jet printing, packaging, and security applications requiring specific chromaticity and stability.
• Pigment Manufacturing: Serves as a key component in creating organic pigments with enhanced lightfastness and weather resistance.
• Research & Development: Employed in chemical R&D for developing new chromophores and studying structure-property relationships in dye chemistry.
• Analytical Reagent: Can be utilized as a staining agent or colorimetric indicator in specific laboratory and diagnostic applications.

Basic Information

Item	Details
Product Name	4,5-Dihydroxy-3-[[2-Ethoxy-4-[(8-Sodiosulfo-2-Naphthalenyl)Azo]-1-Naphthalenyl]Azo]Naphthalene-1-Sulfonic Acid Sodium Salt
CAS No.	6226-95-5
Molecular Formula	C30H21N4Na2O10S2
Molecular Weight	730.61 g/mol
Synonyms	Acid Red 186; C.I. 18810; 4,5-Dihydroxy-3-[(2-ethoxy-4-[(8-sulfo-2-naphthyl)azo]-1-naphthyl)azo]naphthalene-1-sulfonic acid disodium salt; 1-Naphthalenesulfonic acid, 4,5-dihydroxy-3-((2-ethoxy-4-((8-sulfo-2-naphthalenyl)azo)-1-naphthalenyl)azo)-, sodium salt (1:2); Disodium 4,5-dihydroxy-3-[(2-ethoxy-4-[(8-sulfo-2-naphthyl)azo]-1-naphthyl)azo]naphthalene-1-sulfonate
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are provided with each shipment to guarantee traceability and support your quality assurance protocols.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
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.