Description

3-Hydroxy-4-[[4-[(4-Phenylamino-3-Sodiosulfophenyl)Azo]-1-Naphtyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a critical precursor for synthesizing specific, high-performance dyes and pigments, particularly those requiring a specific hue and stability profile. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce colorants with consistent quality and performance.

Application

• Primary Intermediate for Dye Synthesis: Serves as a key building block in the production of acid dyes and direct dyes, especially for coloring polyamide fibers like nylon and wool.
• Textile Industry: Used in the manufacture of dyes applied to textiles, leather, and paper, where good water solubility and affinity for the substrate are required.
• Ink Formulation: Employed as a precursor for pigments and dyes used in inkjet inks, writing inks, and other specialty printing applications.
• Research & Development: Utilized in chemical R&D for developing novel azo compounds with specific optical, electronic, or biological properties.
• Specialty Chemical Production: Acts as an intermediate for creating complex colorants used in plastics, coatings, and other industrial materials.

Basic Information

Item	Detail
Product Name	3-Hydroxy-4-[[4-[(4-Phenylamino-3-Sodiosulfophenyl)Azo]-1-Naphtyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt
CAS No.	6226-84-2
Molecular Formula	C32H21N5Na2O10S3
Molecular Weight	777.70 g/mol
Synonyms	Acid Black 210; C.I. 300310; 3-Hydroxy-4-((4-((4-(phenylamino)-3-sulfophenyl)azo)-1-naphthyl)azo)naphthalene-2,7-disulfonic acid disodium salt; Disodium 3-hydroxy-4-[[4-[(4-phenylamino-3-sulfonatophenyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulfonate; Azo Dye Intermediate 6226-84-2; 1-Naphthalenesulfonic acid, 3-hydroxy-4-((4-((4-(phenylamino)-3-sulfophenyl)azo)-1-naphthyl)azo)-2,7-disulfo-, sodium salt (1:2)
EINECS	Contact for details

Quality Control

Our 3-Hydroxy-4-[[4-[(4-Phenylamino-3-Sodiosulfophenyl)Azo]-1-Naphtyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent composition, and batch-to-batch reliability. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and physical characteristics are available upon request to 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). This material is hygroscopic (moisture-sensitive); the container must be kept tightly 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 solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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