Description

7-[[3-Ethoxy-4-[(2-Hydroxy-1-Naphthalenyl)Azo]-1-Naphthalenyl]Azo]Naphthalene-1,3-Disulfonic Acid Disodium Salt is a high-purity, disulfonated azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart strong, vibrant colors and its excellent water solubility due to the sulfonate groups. It is primarily required by manufacturers in the textile, leather, and specialty ink industries for the synthesis of high-performance dyes and pigments.

Application

• Primary Intermediate for Textile Dyes: Used in the synthesis of acid dyes and direct dyes for coloring wool, silk, nylon, and paper.
• Leather Coloring Agent: Serves as a key component in the production of dyes for high-quality leather finishing.
• Specialty Ink Formulation: Employed in the manufacture of inks for jet printing and other applications requiring high color strength and stability.
• Biological Staining: Potential use as a histological stain in laboratory settings, given its chromophoric properties.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo dye chemistry.

Basic Information

Item	Detail
Product Name	7-[[3-Ethoxy-4-[(2-Hydroxy-1-Naphthalenyl)Azo]-1-Naphthalenyl]Azo]Naphthalene-1,3-Disulfonic Acid Disodium Salt
CAS No.	6406-64-0
Molecular Formula	C32H22N4Na2O8S2
Molecular Weight	700.64 g/mol
Synonyms	Acid Black 234; C.I. 26370; 7-[[3-Ethoxy-4-[(2-hydroxy-1-naphthyl)azo]-1-naphthyl]azo]naphthalene-1,3-disulfonic acid disodium salt; Disodium 7-[[3-ethoxy-4-[(2-hydroxynaphthalen-1-yl)diazenyl]naphthalen-1-yl]diazenyl]naphthalene-1,3-disulfonate; Azo Black 234; Leather Black 234; Naphthalene Black
EINECS	Contact for details

Quality Control

Our production of 7-[[3-Ethoxy-4-[(2-Hydroxy-1-Naphthalenyl)Azo]-1-Naphthalenyl]Azo]Naphthalene-1,3-Disulfonic Acid Disodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical composition. Certificates of Analysis (COA) detailing key specifications are available upon request to support your quality assurance and regulatory compliance needs.

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). This material is hygroscopic (moisture-sensitive); ensure the container is kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content (KF)	Max. 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	6.0 - 8.0

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