Description

Disodium 8-Amino-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its primary value lies in its role as a critical precursor for synthesizing high-performance, colorfast dyes and pigments, particularly in the textile and leather industries. This compound is essential for manufacturers and R&D facilities specializing in the production of reactive, direct, and acid dyes, where precise molecular structure ensures consistent batch-to-batch color quality and performance.

Application

• Primary Intermediate for Textile Dyes: Key building block for manufacturing reactive and direct dyes used in cotton, wool, and nylon coloring.
• Leather Industry Pigments: Used in the synthesis of pigments and dyes for high-quality leather finishing.
• Paper Coloring Agent: Serves as an intermediate for dyes applied in specialty paper and packaging production.
• Ink Formulation: A precursor for pigments used in industrial inks for printing and packaging.
• Research & Development: Used in chemical research for developing new azo compounds with specific chromophoric properties.
• Analytical Chemistry Reagent: May be employed as a standard or reagent in specific colorimetric analytical methods.

Basic Information

Product Name	Disodium 8-Amino-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate
CAS No.	68227-73-6
Molecular Formula	C28H18N6Na2O8S2
Molecular Weight	684.58 g/mol
Synonyms	Acid Black 234; C.I. 31785; Disodium 8-amino-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]naphthalene-2-sulfonate; 2,7-Naphthalenedisulfonic acid, 8-amino-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-, disodium salt; 8-Amino-4-hydroxy-3-((4-((4-sulfonatophenyl)diazenyl)phenyl)diazenyl)naphthalene-2-sulfonate disodium salt; Azo Dye Intermediate 68227-73-6; Black 234
EINECS	Contact for details

Quality Control

Our Disodium 8-Amino-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, color strength, and impurity profiles typical for high-grade dye intermediates. Certificates of Analysis (COA) documenting key parameters such as assay, heavy metals, and moisture content 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (KF Titration)	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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